diff --git a/BurnOutSharp/FileType/Executable.cs b/BurnOutSharp/FileType/Executable.cs
index f6c6de6c..65fb3855 100644
--- a/BurnOutSharp/FileType/Executable.cs
+++ b/BurnOutSharp/FileType/Executable.cs
@@ -146,7 +146,7 @@ namespace BurnOutSharp.FileType
                     bool foundProtection = false;
 
                     // Check using custom content checks first
-                    string protection = contentCheckClass.CheckNEContents(file, fileContent, scanner.IncludeDebug, nex);
+                    string protection = contentCheckClass.CheckNEContents(file, scanner.IncludeDebug, nex);
                     foundProtection |= !string.IsNullOrWhiteSpace(protection);
                     if (ShouldAddProtection(contentCheckClass, scanner, protection))
                         Utilities.AppendToDictionary(protections, file, protection);
diff --git a/BurnOutSharp/INEContentCheck.cs b/BurnOutSharp/INEContentCheck.cs
index 733a4466..d738e3b9 100644
--- a/BurnOutSharp/INEContentCheck.cs
+++ b/BurnOutSharp/INEContentCheck.cs
@@ -9,10 +9,9 @@ namespace BurnOutSharp
         /// Check a path for protections based on file contents
         /// </summary>
         /// <param name="file">File to check for protection indicators</param>
-        /// <param name="fileContent">Byte array representing the file contents</param>
         /// <param name="includeDebug">True to include debug data, false otherwise</param>
         /// <param name="nex">NewExecutable representing the read-in file</param>
         /// <returns>String containing any protections found in the file</returns>
-        string CheckNEContents(string file, byte[] fileContent, bool includeDebug, NewExecutable nex);
+        string CheckNEContents(string file, bool includeDebug, NewExecutable nex);
     }
 }
diff --git a/BurnOutSharp/PackerType/InnoSetup.cs b/BurnOutSharp/PackerType/InnoSetup.cs
index 0605e301..ff7ba657 100644
--- a/BurnOutSharp/PackerType/InnoSetup.cs
+++ b/BurnOutSharp/PackerType/InnoSetup.cs
@@ -16,7 +16,7 @@ namespace BurnOutSharp.PackerType
         public bool ShouldScan(byte[] magic) => true;
 
         /// <inheritdoc/>
-        public string CheckNEContents(string file, byte[] fileContent, bool includeDebug, NewExecutable nex)
+        public string CheckNEContents(string file, bool includeDebug, NewExecutable nex)
         {
             // Get the DOS stub from the executable, if possible
             var stub = nex?.DOSStubHeader;
@@ -26,7 +26,7 @@ namespace BurnOutSharp.PackerType
             // Check for "Inno" in the reserved words
             if (stub.Reserved2[4] == 0x6E49 && stub.Reserved2[5] == 0x6F6E)
             {
-                string version = GetOldVersion(file, fileContent);
+                string version = GetOldVersion(file, nex.SourceArray);
                 if (!string.IsNullOrWhiteSpace(version))
                     return $"Inno Setup {version}";
                 
diff --git a/BurnOutSharp/PackerType/WinZipSFX.cs b/BurnOutSharp/PackerType/WinZipSFX.cs
index aa1d7a94..1dc1ca55 100644
--- a/BurnOutSharp/PackerType/WinZipSFX.cs
+++ b/BurnOutSharp/PackerType/WinZipSFX.cs
@@ -18,7 +18,7 @@ namespace BurnOutSharp.PackerType
         public bool ShouldScan(byte[] magic) => true;
 
         /// <inheritdoc/>
-        public string CheckNEContents(string file, byte[] fileContent, bool includeDebug, NewExecutable nex)
+        public string CheckNEContents(string file, bool includeDebug, NewExecutable nex)
         {
             // Get the DOS stub from the executable, if possible
             var stub = nex?.DOSStubHeader;
@@ -29,7 +29,7 @@ namespace BurnOutSharp.PackerType
             if (!string.IsNullOrWhiteSpace(version))
                 return $"WinZip SFX {version}";
 
-            version = GetNEUnknownHeaderVersion(nex, file, fileContent, includeDebug);
+            version = GetNEUnknownHeaderVersion(nex, file, nex.SourceArray, includeDebug);
             if (!string.IsNullOrWhiteSpace(version))
                 return $"WinZip SFX {version}";
 
diff --git a/BurnOutSharp/PackerType/WiseInstaller.cs b/BurnOutSharp/PackerType/WiseInstaller.cs
index 8ba6316b..df7da265 100644
--- a/BurnOutSharp/PackerType/WiseInstaller.cs
+++ b/BurnOutSharp/PackerType/WiseInstaller.cs
@@ -16,7 +16,7 @@ namespace BurnOutSharp.PackerType
         public bool ShouldScan(byte[] magic) => true;
 
         /// <inheritdoc/>
-        public string CheckNEContents(string file, byte[] fileContent, bool includeDebug, NewExecutable nex)
+        public string CheckNEContents(string file, bool includeDebug, NewExecutable nex)
         {
             // Get the DOS stub from the executable, if possible
             var stub = nex?.DOSStubHeader;
@@ -31,7 +31,7 @@ namespace BurnOutSharp.PackerType
                 new ContentMatchSet(new byte?[] { 0x57, 0x69, 0x73, 0x65, 0x4D, 0x61, 0x69, 0x6E }, "Wise Installation Wizard Module"),
             };
             
-            return MatchUtil.GetFirstMatch(file, fileContent, neMatchSets, includeDebug);
+            return MatchUtil.GetFirstMatch(file, nex.SourceArray, neMatchSets, includeDebug);
         }
 
         /// <inheritdoc/>
diff --git a/BurnOutSharp/ProtectionType/CDDVDCops.cs b/BurnOutSharp/ProtectionType/CDDVDCops.cs
index ac8c4ba0..67feeb06 100644
--- a/BurnOutSharp/ProtectionType/CDDVDCops.cs
+++ b/BurnOutSharp/ProtectionType/CDDVDCops.cs
@@ -41,7 +41,7 @@ namespace BurnOutSharp.ProtectionType
         }
 
         /// <inheritdoc/>
-        public string CheckNEContents(string file, byte[] fileContent, bool includeDebug, NewExecutable nex)
+        public string CheckNEContents(string file, bool includeDebug, NewExecutable nex)
         {
             // Get the DOS stub from the executable, if possible
             var stub = nex?.DOSStubHeader;
@@ -63,7 +63,7 @@ namespace BurnOutSharp.ProtectionType
                 }, GetVersion, "CD-Cops"),
             };
             
-            return MatchUtil.GetFirstMatch(file, fileContent, neMatchSets, includeDebug);
+            return MatchUtil.GetFirstMatch(file, nex.SourceArray, neMatchSets, includeDebug);
         }
 
         /// <inheritdoc/>