diff --git a/decompile/src/JSRF/Core.cpp b/decompile/src/JSRF/Core.cpp
index fe52231..dd896de 100644
--- a/decompile/src/JSRF/Core.cpp
+++ b/decompile/src/JSRF/Core.cpp
@@ -1 +1,5 @@
+/* JSRF Decompilation: JSRF/Core.hpp
+Game and GameObj classes that form the foundation of the JSRF game code.
+*/
+
 #include "Core.hpp"
diff --git a/decompile/src/JSRF/Core.hpp b/decompile/src/JSRF/Core.hpp
index ac9ea71..bcf31b3 100644
--- a/decompile/src/JSRF/Core.hpp
+++ b/decompile/src/JSRF/Core.hpp
@@ -1,4 +1,4 @@
-/* JSRF Decompilation: Core.hpp
+/* JSRF Decompilation: JSRF/Core.hpp
 Game and GameObj classes that form the foundation of the JSRF game code.
 */
 
diff --git a/decompile/src/JSRF/Jet2.cpp b/decompile/src/JSRF/Jet2.cpp
index 65d8fbd..fa21d9a 100644
--- a/decompile/src/JSRF/Jet2.cpp
+++ b/decompile/src/JSRF/Jet2.cpp
@@ -1,3 +1,7 @@
+/* JSRF Decompilation: JSRF/Jet2.cpp
+Main function.
+*/
+
 #pragma bss_seg(".data")
 
 #include "Core.hpp"
diff --git a/decompile/src/Smilebit/MMatrix.cpp b/decompile/src/Smilebit/MMatrix.cpp
index 96a85be..83b8e07 100644
--- a/decompile/src/Smilebit/MMatrix.cpp
+++ b/decompile/src/Smilebit/MMatrix.cpp
@@ -1,4 +1,14 @@
+/* JSRF Decompilation: Smilebit/MMatrix.cpp
+Smilebit's stack-based matrix math library.
+*/
+
 #pragma code_seg("MMATRIX")
+#pragma bss_seg (".data"  )
+
+
+#include "../Std.hpp"
+#include "../XDK/Win32.hpp"
+#include "MMatrix.hpp"
 
 
 // Address: 0x00264C04
diff --git a/decompile/src/Smilebit/MMatrix.hpp b/decompile/src/Smilebit/MMatrix.hpp
index c83f404..788740e 100644
--- a/decompile/src/Smilebit/MMatrix.hpp
+++ b/decompile/src/Smilebit/MMatrix.hpp
@@ -1,4 +1,4 @@
-/* JSRF Decompilation: MMatrix.hpp
+/* JSRF Decompilation: Smilebit/MMatrix.hpp
 Smilebit's stack-based matrix math library.
 */
 
diff --git a/decompile/src/XDK/D3D.hpp b/decompile/src/XDK/D3D.hpp
index e6d36b8..725218c 100644
--- a/decompile/src/XDK/D3D.hpp
+++ b/decompile/src/XDK/D3D.hpp
@@ -1,4 +1,4 @@
-/* JSRF Decompilation: D3D.hpp
+/* JSRF Decompilation: XDK/D3D.hpp
 Direct3D8 declarations.
 */
 
diff --git a/decompile/src/XDK/Win32.hpp b/decompile/src/XDK/Win32.hpp
index d4ab8d2..5804e1e 100644
--- a/decompile/src/XDK/Win32.hpp
+++ b/decompile/src/XDK/Win32.hpp
@@ -1,4 +1,4 @@
-/* JSRF Decompilation: Win32.hpp
+/* JSRF Decompilation: XDK/Win32.hpp
 Definitions normally provided by Windows headers.
 */
 
@@ -37,4 +37,10 @@ union LARGE_INTEGER {
     LONGLONG QuadPart;
 };
 
+// Return codes
+typedef long HRESULT;
+
+#define ERROR_SUCCESS 0L
+#define E_OUTOFMEMORY 0x8007000EL
+
 #endif