I just got a modded Saturn today+action replay 4in1, and have been having similar problems with properly burning ISO+mp3 rips of games. Rather than start a new thread, I thought I'd just ask my questions here.
I'm using Nero 5 to burn these images, and have tried a number of things to get games working properly on the system. So far I've attempted burning 6 different games/images, and have successfully burned 2.
Radiant Silvergun = Failed
Bust a Move 2 = Failed
Metal Slug = Failed
Fantasy Zone = Failed
Sexy Parodius = Worked
Cotton 2 = Worked
The images Sexy Parodius and Cotton 2 were both simply just an ISO file, whereas the other games were all ISO+mp3 images. On 2 of the failed games, I've noticed that the game begins to load (Metal Slug and Bust a Move 2), but then freezes. I've tried burning them the following ways: using a cue sheet, burning a mixed mode iso/audio cd, and making a multisession disc where the gamedata resides on the first track, and the music is on the subsequent tracks. I'm using Fuji CDR's, so the medium is relatively decent.
I'm trying to figure out what I've been doing wrong, and it's only after I've burned a number of coasters that I'm asking you guys for advice. Any ideas? I really appreciate any and all help.