AcetoneISO (CD/DVD image manipulator for GNU/Linux)

AcetoneISO is a feature-rich and complete software application to
manage CD/DVD images. AcetoneISO will let You mount typical 
proprietary images formats of the Windows world such as ISO BIN NRG 
MDF IMG and do plenty of other things.

Some features you can see in /usr/doc/$PRGNAM-$VERSION/FEATURES.

To create images from folders this suggest "xorriso" from  AlienBob's
repository: http://www.slackware.com/~alien/slackbuilds/xorriso/