IsoBuster and Nero *.iso images?



I recently tested a proggie named IsoBuster
( that claims to handle various CD image formats including *.iso created by...Nero??

As far as I know Nero has always(?) created its own images (with the *.nrg extension).

So I wonder, Is there a bug in IsoBuster or can Nero create "pure" *.iso files?

Tnx for any answer.