cdi2nero problems, here's why some get Audio cd's
 

This is a bad LBA problem, i.e. your burner doesn't support "short" tracks, so you get an audio-only CD since data track is in bad LBA position. you can check this with ISObuster.

I'm afraid the only working methods for you are xeal's guide or patches, which are on his homepage (search for "the end of all buffer underruns"): http://xeal.cjb.net

Also, if you are having problems with multiple audio track images wait for CDIfix 0.3 which is already in beta testing phase (won't work for single audio track images, though).

DeXT