diff --git a/BurnOutSharp.Models/CFB/Constants.cs b/BurnOutSharp.Models/CFB/Constants.cs
index 3d15c16f..4f6b9435 100644
--- a/BurnOutSharp.Models/CFB/Constants.cs
+++ b/BurnOutSharp.Models/CFB/Constants.cs
@@ -1,3 +1,5 @@
+using System;
+
 namespace BurnOutSharp.Models.CFB
 {
     public static class Constants
@@ -5,5 +7,16 @@ namespace BurnOutSharp.Models.CFB
         public static readonly byte[] SignatureBytes = new byte[] { 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1 };
     
         public const ulong SignatureUInt64 = 0xE11AB1A1E011CFD0;
+
+        #region Class IDs
+
+        // <remarks>Shares a value with Merge Module and Patch Creation Properties</remarks>
+        public static readonly Guid InstallerPackage = new Guid("000c1084-0000-0000-c000-000000000046");
+
+        public static readonly Guid PatchPackage = new Guid("000C1086-0000-0000-C000-000000000046");
+
+        public static readonly Guid Transform = new Guid("000C1082-0000-0000-C000-000000000046");
+
+        #endregion
     }
 }
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