Here is an unreal 3 game that looks great and is very close to being supported bye your great program.
I was experimenting with your program on these archives and I kept getting invalid name in archive errors.
so i pasted the file header from a working archive onto these archives and it loaded
I can now extract the archives and brows the textures the only problem is the mesh files.http://sg.nvidia.com/object/games_nurien_sg.html
this is the demo I can post the full game download if you are interested in it.
I have uploaded a sample archive with working textures and the same archive without the modified header for you to look at if you get a chance.http://www.MegaShare.com/712539