I DID IT! MAME ON USB! 102 ROMS
I finally did it! I have MAME running from a USB stick, currently with 102 games (and counting). I use OPL to run an ISO off the thumb drive. The games are unzipped in their own folder within the ROMS folder itself.
Is there a comprehensive list of games that run in PS2MAME? Or a list of non-compatible games? Battle Zone, Asteroids and a few others I just can't get to work.
I'm building a huge collection of games (STELLA, MAME, etc.) for the PS2, all running from my thumb drive! Yay, I'm so happy I managed to iron out the MAME problems. Goodness knows how many tries I gave it! :)