First, i hope this is the right section to post
Ok, so, I want to decompile a exe patch for a game, or look into all the files stored in it or something like that.
The game is trackmania
And i wanne do that because i wanne patch it in a very similar way that existing patch already does.
The exe talked about can be downloaded here (to big to attach): http://www.focus-files.com/patchs/tmuf/TmUnitedForever_StarEdition_Update.exe
Can somebody please help me?

it is a hole game, so it is a hole folder, and i am not able to get to a unpatched version of the game
and i think it is written in c++

You can sometimes decompile exe's, but only if you know what it's written in. Also, keep in mind that some exe's also contain data, which can make the output of the decompiler incorrect.

it is a official game (http://www.trackmaniaforever.com) and the patch is also official, and what i wanne do, i wanne patch the game in a similar way the patch already does, adding another camaign to it.

and i mean a real campaign, in-game with unlocking maps etc.
and your gbx master, what kind of gbx's can it read?

They published it as a patch

I'm a bit late, but can't you just rename an .exe to .zip then open it to view its content? I know the source won't be there, but I wonder if this can help?

No, ZIPs have a special file format not present in PE binaries. You're thinking of Java .jar files, which are functionally renamed .zip files with some metadata thrown in there.

I'm sure there are directory compare tools. If not you could easily write one.