Other wm do not have other burning utilities. Anyway, to change your wm, you should click on 'Session' button on the login screen.
in VL I always use bashburn, I don't know if it's in the repos, but installing it is easy anyway... I haven't tried any other burning utility since I discovered it. Stable, clean, fast, and console
Check That the iso you downloaded is complete, maybe a bad .iso file . If it's your case, take a look at wget -c , it'll save you hours of downloading on a slow (dialup) connection