diff --git a/SabreTools.Helper/Dats/Partials/DatFile.Parsers.cs b/SabreTools.Helper/Dats/Partials/DatFile.Parsers.cs
index 805b6a9a..7363ca15 100644
--- a/SabreTools.Helper/Dats/Partials/DatFile.Parsers.cs
+++ b/SabreTools.Helper/Dats/Partials/DatFile.Parsers.cs
@@ -102,13 +102,13 @@ namespace SabreTools.Helper.Dats
 					break;
 				case DatFormat.ClrMamePro:
 				case DatFormat.DOSCenter:
-					ParseCMP(filename, sysid, srcid, filter, splitType, trim, single, root, logger, keep, clean);
+					ParseCMP(filename, sysid, srcid, filter, trim, single, root, logger, keep, clean);
 					break;
 				case DatFormat.Logiqx:
 				case DatFormat.OfflineList:
 				case DatFormat.SabreDat:
 				case DatFormat.SoftwareList:
-					ParseGenericXML(filename, sysid, srcid, filter, splitType, trim, single, root, logger, keep, clean, softlist);
+					ParseGenericXML(filename, sysid, srcid, filter, trim, single, root, logger, keep, clean, softlist);
 					break;
 				case DatFormat.RedumpMD5:
 					ParseRedumpMD5(filename, sysid, srcid, filter, trim, single, root, logger, clean);
@@ -120,11 +120,25 @@ namespace SabreTools.Helper.Dats
 					ParseRedumpSHA1(filename, sysid, srcid, filter, trim, single, root, logger, clean);
 					break;
 				case DatFormat.RomCenter:
-					ParseRC(filename, sysid, srcid, filter, splitType, trim, single, root, logger, clean);
+					ParseRC(filename, sysid, srcid, filter, trim, single, root, logger, clean);
 					break;
 				default:
 					return;
 			}
+
+			// Now we pre-process the DAT with the splitting/merging mode
+			if (splitType == SplitType.Split)
+			{
+				CreateSplitSets(false, logger, output: false);
+			}
+			else if (splitType == SplitType.Merged)
+			{
+				CreateMergedSets(false, logger, output: false);
+			}
+			else if (splitType == SplitType.MergedWithDevice)
+			{
+				logger.User("Full merging is not yet available. Sorry for the inconvenience");
+			}
 		}
 
 		/// <summary>
@@ -213,7 +227,7 @@ namespace SabreTools.Helper.Dats
 
 				// Now process and add the rom
 				string key = "";
-				ParseAddHelper(rom, filter, SplitType.None, trim, single, root, clean, logger, out key);
+				ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 			}
 
 			sr.Dispose();
@@ -226,7 +240,6 @@ namespace SabreTools.Helper.Dats
 		/// <param name="sysid">System ID for the DAT</param>
 		/// <param name="srcid">Source ID for the DAT</param>
 		/// <param name="filter">Filter object for passing to the DatItem level</param>
-		/// <param name="splitType">Type of the split that should be performed (split, merged, fully merged)</param>
 		/// <param name="trim">True if we are supposed to trim names to NTFS length, false otherwise</param>
 		/// <param name="single">True if all games should be replaced by '!', false otherwise</param>
 		/// <param name="root">String representing root directory to compare against for length calculation</param>
@@ -243,7 +256,6 @@ namespace SabreTools.Helper.Dats
 			Filter filter,
 
 			// Rom renaming
-			SplitType splitType,
 			bool trim,
 			bool single,
 			string root,
@@ -359,7 +371,7 @@ namespace SabreTools.Helper.Dats
 
 						// Now process and add the sample
 						key = "";
-						ParseAddHelper(item, filter, splitType, trim, single, root, clean, logger, out key);
+						ParseAddHelper(item, filter, trim, single, root, clean, logger, out key);
 
 						continue;
 					}
@@ -420,7 +432,7 @@ namespace SabreTools.Helper.Dats
 
 						// Now process and add the rom
 						key = "";
-						ParseAddHelper(item, filter, splitType, trim, single, root, clean, logger, out key);
+						ParseAddHelper(item, filter, trim, single, root, clean, logger, out key);
 						continue;
 					}
 
@@ -595,7 +607,7 @@ namespace SabreTools.Helper.Dats
 
 					// Now process and add the rom
 					key = "";
-					ParseAddHelper(item, filter, splitType, trim, single, root, clean, logger, out key);
+					ParseAddHelper(item, filter, trim, single, root, clean, logger, out key);
 				}
 
 				// If the line is anything but a rom or disk and we're in a block
@@ -768,7 +780,6 @@ namespace SabreTools.Helper.Dats
 		/// <param name="sysid">System ID for the DAT</param>
 		/// <param name="srcid">Source ID for the DAT</param>
 		/// <param name="filter">Filter object for passing to the DatItem level</param>
-		/// <param name="splitType">Type of the split that should be performed (split, merged, fully merged)</param>
 		/// <param name="trim">True if we are supposed to trim names to NTFS length, false otherwise</param>
 		/// <param name="single">True if all games should be replaced by '!', false otherwise</param>
 		/// <param name="root">String representing root directory to compare against for length calculation</param>
@@ -786,7 +797,6 @@ namespace SabreTools.Helper.Dats
 			Filter filter,
 
 			// Rom renaming
-			SplitType splitType,
 			bool trim,
 			bool single,
 			string root,
@@ -830,7 +840,7 @@ namespace SabreTools.Helper.Dats
 							Rom rom = new Rom("null", tempgame);
 
 							// Now process and add the rom
-							ParseAddHelper(rom, filter, splitType, trim, single, root, clean, logger, out key);
+							ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 						}
 
 						// Regardless, end the current folder
@@ -1350,7 +1360,7 @@ namespace SabreTools.Helper.Dats
 										};
 
 										// Now process and add the rom
-										ParseAddHelper(olrom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(olrom, filter, trim, single, root, clean, logger, out key);
 										break;
 
 									// For Software List only
@@ -1432,7 +1442,7 @@ namespace SabreTools.Helper.Dats
 										};
 
 										// Now process and add the rom
-										ParseAddHelper(relrom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(relrom, filter, trim, single, root, clean, logger, out key);
 
 										subreader.Read();
 										break;
@@ -1475,7 +1485,7 @@ namespace SabreTools.Helper.Dats
 										};
 
 										// Now process and add the rom
-										ParseAddHelper(biosrom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(biosrom, filter, trim, single, root, clean, logger, out key);
 
 										subreader.Read();
 										break;
@@ -1503,7 +1513,7 @@ namespace SabreTools.Helper.Dats
 										};
 
 										// Now process and add the rom
-										ParseAddHelper(archiverom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(archiverom, filter, trim, single, root, clean, logger, out key);
 
 										subreader.Read();
 										break;
@@ -1531,7 +1541,7 @@ namespace SabreTools.Helper.Dats
 										};
 
 										// Now process and add the rom
-										ParseAddHelper(samplerom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(samplerom, filter, trim, single, root, clean, logger, out key);
 
 										subreader.Read();
 										break;
@@ -1667,7 +1677,7 @@ namespace SabreTools.Helper.Dats
 										}
 
 										// Now process and add the rom
-										ParseAddHelper(inrom, filter, splitType, trim, single, root, clean, logger, out key);
+										ParseAddHelper(inrom, filter, trim, single, root, clean, logger, out key);
 
 										subreader.Read();
 										break;
@@ -1839,7 +1849,7 @@ namespace SabreTools.Helper.Dats
 							}
 
 							// Now process and add the rom
-							ParseAddHelper(rom, filter, splitType, trim, single, root, clean, logger, out key);
+							ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 
 							xtr.Read();
 							break;
@@ -1916,7 +1926,7 @@ namespace SabreTools.Helper.Dats
 
 				// Now process and add the rom
 				string key = "";
-				ParseAddHelper(rom, filter, SplitType.None, trim, single, root, clean, logger, out key);
+				ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 			}
 
 			sr.Dispose();
@@ -1978,7 +1988,7 @@ namespace SabreTools.Helper.Dats
 
 				// Now process and add the rom
 				string key = "";
-				ParseAddHelper(rom, filter, SplitType.None, trim, single, root, clean, logger, out key);
+				ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 			}
 
 			sr.Dispose();
@@ -2040,7 +2050,7 @@ namespace SabreTools.Helper.Dats
 
 				// Now process and add the rom
 				string key = "";
-				ParseAddHelper(rom, filter, SplitType.None, trim, single, root, clean, logger, out key);
+				ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 			}
 
 			sr.Dispose();
@@ -2053,7 +2063,6 @@ namespace SabreTools.Helper.Dats
 		/// <param name="sysid">System ID for the DAT</param>
 		/// <param name="srcid">Source ID for the DAT</param>
 		/// <param name="filter">Filter object for passing to the DatItem level</param>
-		/// <param name="splitType">Type of the split that should be performed (split, merged, fully merged)</param>
 		/// <param name="trim">True if we are supposed to trim names to NTFS length, false otherwise</param>
 		/// <param name="single">True if all games should be replaced by '!', false otherwise</param>
 		/// <param name="root">String representing root directory to compare against for length calculation</param>
@@ -2069,7 +2078,6 @@ namespace SabreTools.Helper.Dats
 			Filter filter,
 
 			// Rom renaming
-			SplitType splitType,
 			bool trim,
 			bool single,
 			string root,
@@ -2218,7 +2226,7 @@ namespace SabreTools.Helper.Dats
 
 						// Now process and add the rom
 						string key = "";
-						ParseAddHelper(rom, filter, splitType, trim, single, root, clean, logger, out key);
+						ParseAddHelper(rom, filter, trim, single, root, clean, logger, out key);
 					}
 				}
 			}
@@ -2231,12 +2239,11 @@ namespace SabreTools.Helper.Dats
 		/// </summary>
 		/// <param name="item">Item data to check against</param>
 		/// <param name="filter">Filter object for passing to the DatItem level</param>
-		/// <param name="splitType">Type of the split that should be performed (split, merged, fully merged)</param>
 		/// <param name="trim">True if we are supposed to trim names to NTFS length, false otherwise</param>
 		/// <param name="single">True if all games should be replaced by '!', false otherwise</param>
 		/// <param name="root">String representing root directory to compare against for length calculation</param>
 		/// <param name="logger">Logger object for console and/or file output</param>
-		private void ParseAddHelper(DatItem item, Filter filter, SplitType splitType, bool trim, bool single, string root, bool clean, Logger logger, out string key)
+		private void ParseAddHelper(DatItem item, Filter filter, bool trim, bool single, string root, bool clean, Logger logger, out string key)
 		{
 			key = "";