Burning non-selfboot games

I understand that my crappy Philips CDburner is incapable of burning selfboots (because nero wont let me check "open new session"), but I burned a boot disc, so if could only burn the isos I'd be set. My problem is that I can't find a consistent description of how to burn non-selfboot games. I downloaded the games in .cdi format, then used CDIrip to extract the iso (dj2.0 always crashes cuz of aspi problems even though i have the newest drivers and all) so I can use another program (I've tried nero, cdrwin, ezcd, fireburner...).
I've tried just burning the .iso file to the disc, but that doesnt seem to work. Any ideas what I'm doing wrong?