I just went to backup MX 2002 (motorcross game) on the Xbox and upon looking I discovered (PS2 files) Slus 200.72, ioprp214.img, ioprp211.img and system file, which states boot2 : slus 200.72 followed by VMODE : NTSC.
Now these files are on PS2 games, I have no idea why they are on a Xbox game DVD (original). It seemed weird. Were the makers of the game waiting for the PS2 emulator, who knows, lol.
I kid you not, these files are on the MX2002 xbox game. It just seemed funny to me. If you want to have a look, the files were in the assists, then cd/dvd folder. Just sitting right there.
(Just to let you guys know, the version of the game is Pal, so not sure if the NTSC will be different. Maybe I should put the xbox mx2002 game into my PS2..... I don't think so, lol)