Code:
system/chatcmds.xml.System/chatcmds.xml
I found that in Hex WorkShop.
(Before I go explain this little bit, I never tried this, probably will today.)
See where it says system/chatcmds.xml?
Well, from what i'm guessing is just simply change the system/chatcmds.xml.System/chatcmds.xml to
gunz/chatcmds.xml.Gunz/chatcmds.xml.
If you make the folder's first letter with a uppercase letter, that's where the .Gunz/chatcmds.xml comes in. ;)
To make the .dll's into theduel.exe, I would suspect making some jmps and codecaves.
Not sure, never thought about it.