Sorry about the double post here, I couldn't figure out how to edit my previous post. Is that even an option? Anyway, turns out the idea of replacing 'cdrom:0\' with '\' is a wild goose chase. Two things confirm it for me: 1. It didn't work with Rogue Trooper. I tried simply removing the reference, and then replacing it with '00's in hex (to preserve original file size and memory addresses). Didn't work either way. 2. Out of curiosity, I looked though the SLUS file for Tomb Raider: Legend, which works just fine though USB Advance (except for the videos, of course). It also happens to have multiple references to 'cdrom:0\', so that can't be what's causing the problem. 3. The SYSTEM.CNF files for Rogue Trooper, Sly 2, and Tomb Raider: Legend all shart with "boot2=cdrom0:\". This leads me to believe that USB Advance intercepts and replaces references to cdrom0, just like HD Advance, so something else must be causing the incompatibility. On a different subject, do you think there might be any way to get videos working properly with USB Advance? I ask because last night I was able to watch AVIs on my PS2, loading directly from the USB HDD. All it had to do was build up a bit of a buffer at the beginning, like when you watch videos on the net. I realize that a solution would probably involve editing the game code itself, which is beyond the means of most of us, but perhaps someone smart out there could cook up a solution.