Most MGS4 files are not encrypted, just in it's own format, though I'm pretty sure some of the .dats are encrypted. MGO2 files on the other hand, are encrypted. I think you got confused with the filename hashing, which someone said was the same for MGS3 and MGS4 (and GZ?) somewhere. I believe a lot ...

i have not looked into the geom data as of yet. Mainly because i have not finished implementing everything related to mesh, texture, and animation data yet. The gcx files are related to scripting. i have not looked into those much either. i'll see if i can find the method(s) that process geom data ...

Have you looked at stage collision data, or anything similar at all, revelation? Jay and I have been looking into custom stages on MGS4/MGO2–we've been able to do some things like texture modification, object swapping, and .GEOM swapping. The .GEOMs seem to contain the collision data among other thi...

I know this is probably not quite what you were looking for, but if you wish to debug a retail PS2, you can use Kermit DBG by SilverBull of ASSEMblergames. It's the only debugging solution I could find for the PS2, other than buying a TOOL. It's quite useful, but it does have it's issues, from what ...