This isn't an average problem like the technical issus commonly posted here.
I have a softmodded Xbox and I can view the filesystem of each game I've loaded onto my hard drive. While browsing through the files of Tony Hawk's Pro Skater 3, I noticed that the Foo level is in there, as well as another unused one.
I've been trying to figure out how to load these levels, and I've already tested file replacement - instant game crash. I know that a PC mod can load these levels, but does anyone know of a way to load them on an Xbox? I can modify files if need be, just tell me which ones.