Oh... I forgot that this forum is all about uncompressing things, not editing them.

Found this on sourceforge.net http://sourceforge.net/projects/yugiohextractor An application that can extract, replace and view the files as cards, sound effects and music from the Yu Gi Oh! Power of Chaos PC games. It is written in C# .NET. Aplicaci�n que puede extraer y manipular los archivos de...

Link?

Ok, the dowload has all the files within the zpackage execpt levels. I only tossed in two levels- an mp and sp map, because of size.
Edit: The files don't seem to be compressed at all. Now all we need is an editor.

Not sure how big of a bumb this is as I found the topic via search... anyway-
I have always been interested in modding this game and I was wondering if anything has been accomplished? Has anyone tried playing the game then checking there chache?