diff --git a/SabreTools.Helper/Data/Build.cs b/SabreTools.Helper/Data/Build.cs
index 86afafcc..9d11dc0a 100644
--- a/SabreTools.Helper/Data/Build.cs
+++ b/SabreTools.Helper/Data/Build.cs
@@ -134,7 +134,7 @@ namespace SabreTools.Helper
 					helptext.Add("	-ab, --add-blank	Output blank files for folders");
 					helptext.Add("	-ad, --add-date		Output dates for each file parsed");
 					helptext.Add("	-cf, --copy-files	Copy files to the temp directory before parsing");
-					helptext.Add("	-rh, --rem-head		Remove headers from hash calculations");
+					helptext.Add("	-h=, --header=		Set a header skipper to use, blank means all");
 					helptext.Add("	-t=, --temp=		Set the temporary directory to use");
 					helptext.Add("	-mt={4}			Amount of threads to use (-1 unlimted)");
 					helptext.Add("  -es, --ext-split	Split a DAT by two file extensions");
diff --git a/SabreTools.Helper/README.1ST b/SabreTools.Helper/README.1ST
index 4343bc19..38e63d72 100644
--- a/SabreTools.Helper/README.1ST
+++ b/SabreTools.Helper/README.1ST
@@ -240,10 +240,12 @@ Options:
 			If this flag is set, then all files that are going to be parsed are moved to the temporary directory before being hashed. This can be helpful in cases where the
 			temp folder is located on an SSD and the user wants to take advantage of this.
 			
-		-rh, --rem-head		Remove headers from hash calculations
-			If this flag is set, then all files that have copier headers that are detected will
+		-h=, --header=		Remove headers from hash calculations
+			If this is set, then all files that have copier headers that are detected will
 			have them removed from the hash calculation. This will allow for a headered collection
-			to be hashed without possibly variant information.
+			to be hashed without possibly variant information. If a particular header skipper is
+			defined, and that skipper exists, then it will be used instead of trying to find one
+			that matches.
 			
 		-t=, --temp=		Set the name of the temporary directory
 			Optionally, a temp folder can be supplied in the case the default temp directory
diff --git a/SabreTools/Partials/SabreTools_Inits.cs b/SabreTools/Partials/SabreTools_Inits.cs
index 9ca2414f..7a52d61f 100644
--- a/SabreTools/Partials/SabreTools_Inits.cs
+++ b/SabreTools/Partials/SabreTools_Inits.cs
@@ -97,7 +97,7 @@ namespace SabreTools
 			int maxDegreeOfParallelism)
 		{
 			ForcePacking fp = ForcePacking.None;
-			switch (forcepack.ToLowerInvariant())
+			switch (forcepack?.ToLowerInvariant())
 			{
 				case "none":
 				default:
@@ -474,7 +474,7 @@ namespace SabreTools
 		{
 			// Set the special flags
 			ForceMerging fm = ForceMerging.None;
-			switch (forcemerge.ToLowerInvariant())
+			switch (forcemerge?.ToLowerInvariant())
 			{
 				case "none":
 				default:
@@ -489,7 +489,7 @@ namespace SabreTools
 			}
 
 			ForceNodump fn = ForceNodump.None;
-			switch (forcend.ToLowerInvariant())
+			switch (forcend?.ToLowerInvariant())
 			{
 				case "none":
 				default:
@@ -507,7 +507,7 @@ namespace SabreTools
 			}
 
 			ForcePacking fp = ForcePacking.None;
-			switch (forcepack.ToLowerInvariant())
+			switch (forcepack?.ToLowerInvariant())
 			{
 				case "none":
 				default:
@@ -523,7 +523,7 @@ namespace SabreTools
 
 			// Set the status flag for filtering
 			ItemStatus itemStatus = ItemStatus.NULL;
-			switch(status.ToLowerInvariant())
+			switch(status?.ToLowerInvariant())
 			{
 				case "none":
 					itemStatus = ItemStatus.None;
diff --git a/SabreTools/SabreTools.cs b/SabreTools/SabreTools.cs
index 784908dc..5598d4b3 100644
--- a/SabreTools/SabreTools.cs
+++ b/SabreTools/SabreTools.cs
@@ -94,39 +94,39 @@ namespace SabreTools
 				seq = -1;
 			OutputFormat outputFormat = 0x0;
 			StatOutputFormat statOutputFormat = StatOutputFormat.None;
-			string addext = null,
+			string addext = "",
 				author = null,
 				category = null,
 				comment = null,
-				crc = null,
-				currentAllMerged = null,
-				currentMissingMerged = null,
-				currentNewMerged = null,
+				crc = "",
+				currentAllMerged = "",
+				currentMissingMerged = "",
+				currentNewMerged = "",
 				date = null,
 				description = null,
 				email = null,
-				exta = null,
-				extb = null,
+				exta = "",
+				extb = "",
 				filename = null,
-				forcemerge = null,
-				forcend = null,
-				forcepack = null,
-				gamename = null,
+				forcemerge = "",
+				forcend = "",
+				forcepack = "",
+				gamename = "",
 				header = null,
-				homepage = null,
+				homepage = "",
 				name = null,
-				md5 = null,
-				outDir = null,
-				postfix = null,
-				prefix = null,
-				repext = null,
-				romname = null,
-				romtype = null,
-				root = null,
+				md5 = "",
+				outDir = "",
+				postfix = "",
+				prefix = "",
+				repext = "",
+				romname = "",
+				romtype = "",
+				root = "",
 				rootdir = null,
-				sha1 = null,
-				status = null,
-				tempDir = null,
+				sha1 = "",
+				status = "",
+				tempDir = "",
 				url = null,
 				version = null;
 			List<string> inputs = new List<string>();
@@ -357,163 +357,163 @@ namespace SabreTools
 
 						if (temparg.StartsWith("-ae=") || temparg.StartsWith("--add-ext="))
 						{
-							addext = temparg.Split('=')[1];
+							addext = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-au=") || temparg.StartsWith("--author="))
 						{
-							author = temparg.Split('=')[1];
+							author = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-ca=") || temparg.StartsWith("--category="))
 						{
-							category = temparg.Split('=')[1];
+							category = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-co=") || temparg.StartsWith("--comment="))
 						{
-							comment = temparg.Split('=')[1];
+							comment = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-com=") || temparg.StartsWith("--com="))
 						{
-							currentAllMerged = temparg.Split('=')[1];
+							currentAllMerged = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-crc=") || temparg.StartsWith("--crc="))
 						{
-							crc = temparg.Split('=')[1];
+							crc = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-da=") || temparg.StartsWith("--date="))
 						{
-							date = temparg.Split('=')[1];
+							date = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-de=") || temparg.StartsWith("--desc="))
 						{
-							description = temparg.Split('=')[1];
+							description = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-em=") || temparg.StartsWith("--email="))
 						{
-							email = temparg.Split('=')[1];
+							email = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-exta="))
 						{
-							exta = temparg.Split('=')[1];
+							exta = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-extb="))
 						{
-							extb = temparg.Split('=')[1];
+							extb = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-f=") || temparg.StartsWith("--filename="))
 						{
-							filename = temparg.Split('=')[1];
+							filename = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-fix=") || temparg.StartsWith("--fix="))
 						{
-							currentMissingMerged = temparg.Split('=')[1];
+							currentMissingMerged = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-fm=") || temparg.StartsWith("--forcemerge="))
 						{
-							forcemerge = temparg.Split('=')[1];
+							forcemerge = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-fn=") || temparg.StartsWith("--forcend="))
 						{
-							forcend = temparg.Split('=')[1];
+							forcend = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-fp=") || temparg.StartsWith("--forcepack="))
 						{
-							forcepack = temparg.Split('=')[1];
+							forcepack = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-gn=") || temparg.StartsWith("--game-name="))
 						{
-							gamename = temparg.Split('=')[1];
+							gamename = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-h=") || temparg.StartsWith("--header="))
 						{
-							header = temparg.Split('=')[1];
+							header = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-hp=") || temparg.StartsWith("--homepage="))
 						{
-							homepage = temparg.Split('=')[1];
+							homepage = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-input="))
 						{
-							inputs.Add(temparg.Split('=')[1]);
+							inputs.Add(temparg.Split('=')[1] ?? "");
 						}
 						else if (temparg.StartsWith("-is=") || temparg.StartsWith("--status="))
 						{
-							status = temparg.Split('=')[1];
+							status = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-md5=") || temparg.StartsWith("--md5="))
 						{
-							md5 = temparg.Split('=')[1];
+							md5 = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-mt=") || temparg.StartsWith("--mt="))
 						{
-							Int32.TryParse(temparg.Split('=')[1], out maxParallelism);
+							Int32.TryParse(temparg.Split('=')[1] ?? "", out maxParallelism);
 						}
 						else if (temparg.StartsWith("-n=") || temparg.StartsWith("--name="))
 						{
-							name = temparg.Split('=')[1];
+							name = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-new=") || temparg.StartsWith("--new="))
 						{
-							currentNewMerged = temparg.Split('=')[1];
+							currentNewMerged = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-out=") || temparg.StartsWith("--out="))
 						{
-							outDir = temparg.Split('=')[1];
+							outDir = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-post=") || temparg.StartsWith("--postfix="))
 						{
-							postfix = temparg.Split('=')[1];
+							postfix = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-pre=") || temparg.StartsWith("--prefix="))
 						{
-							prefix = temparg.Split('=')[1];
+							prefix = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-r=") || temparg.StartsWith("--root="))
 						{
-							rootdir = temparg.Split('=')[1];
+							rootdir = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-rd=") || temparg.StartsWith("--root-dir="))
 						{
-							root = temparg.Split('=')[1];
+							root = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-re=") || temparg.StartsWith("--rep-ext="))
 						{
-							repext = temparg.Split('=')[1];
+							repext = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-rn=") || temparg.StartsWith("--rom-name="))
 						{
-							romname = temparg.Split('=')[1];
+							romname = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-rt=") || temparg.StartsWith("--rom-type="))
 						{
-							romtype = temparg.Split('=')[1];
+							romtype = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-seq=") || temparg.StartsWith("--equal="))
 						{
-							seq = GetSizeFromString(temparg.Split('=')[1]);
+							seq = GetSizeFromString(temparg.Split('=')[1] ?? "");
 						}
 						else if (temparg.StartsWith("-sgt=") || temparg.StartsWith("--greater="))
 						{
-							sgt = GetSizeFromString(temparg.Split('=')[1]);
+							sgt = GetSizeFromString(temparg.Split('=')[1] ?? "");
 						}
 						else if (temparg.StartsWith("-sha1=") || temparg.StartsWith("--sha1="))
 						{
-							sha1 = temparg.Split('=')[1];
+							sha1 = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-slt=") || temparg.StartsWith("--less="))
 						{
-							slt = GetSizeFromString(temparg.Split('=')[1]);
+							slt = GetSizeFromString(temparg.Split('=')[1] ?? "");
 						}
 						else if (temparg.StartsWith("-t=") || temparg.StartsWith("--temp="))
 						{
-							tempDir = temparg.Split('=')[1];
+							tempDir = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-u=") || temparg.StartsWith("-url=") || temparg.StartsWith("--url="))
 						{
-							url = temparg.Split('=')[1];
+							url = temparg.Split('=')[1] ?? "";
 						}
 						else if (temparg.StartsWith("-v=") || temparg.StartsWith("--version="))
 						{
-							version = temparg.Split('=')[1];
+							version = temparg.Split('=')[1] ?? "";
 						}
 						else if (File.Exists(temparg) || Directory.Exists(temparg))
 						{