So far I've downloaded the following:

Alien vs Predator
Burnout Revenge (Gamerip)
Dead Rising Original Score
Dead Rising Soundtrack
Gears of War
Ikaruga (Dreamcast Rip)
Kingdom Hearts Simple & Clean And Sanctuary Remixes And Extras
Quake III - Arena - Original Soundtrack
Rez - Gamer's Guide to
Rez Game Sound Data (Game Rip)
Unreal Tournament 2004

The only one that worked was Unreal Tournament 2004. Every other one says it's an unrecognizable format.

Is there some reason most of these don't work?