Cool,i hope you have better luck than myself....I heard there is a disc called DC-X for which you have to pay (guess there are no rips) that boots games ntsc,just like psx import player.
There is an "unofficial" version of utopia too,version 1.3,im gonna try it now *crosses fingers*
Ill keep you updated
I think the problem of gameshark/action replay is that they make the dreamcast output NTSC signal,instead of PAL 60hz,which is the good choice (best image quality ive ever seen).