Burning issues

Has anyone else had problems with Lunar TSS from Blaspheme's FTP? For me it will get to the startup logo before freezing.

I have a PAL mega drive, but a CDX converter so it should be OK without using SCDconv.

ISO/MP3 (converted to WAV using mp32wav). I'm using CDRWin, and I can't see how to choose between disk or track at once. So I tried in Nero, and after I select the cue file I see that it has "Disk at once" selected but greyed out so that it can't be changed.