Here is the file decompressed:
http://www.mediafire.com/?1ujh04d0wja6jj3
You can open in Granny Viewer with no problems. Try and open it with the app and you will get an error about irradiance map unknown. I'll be updating the app when I have more time.
This is probably the first GR2 file decompressed without the use of Rad Games Tools DLLs
The Granny Viewer is going to be the downfall of them. It tells me everything I've wanted to know and more
There was no sense in re-inventing the wheel and adding the code to decompress the GR2 file into the app (not to mention it's rather complex how they do their compression). It was easier to have the app spawn the Granny Viewer app, insert some assembly code into it, have the user open the file they want to decompress with the Granny Viewer, once the Granny Viewer displays the contents user closes Granny Viewer, app then reads the decompressed files spit out and builds a new GR2 file. Easy, simple, elegant...Utter shear beauty! That takes exploitation to a new level for me