[Grml] How grml cd image is created

Hi,

Quick question, how the grml cd image is created (from a directory)?

A side question, is there any way to search the grml source code (in git or ...)?

http://git.grml.org/?p=grml- live.git&a=search&h=HEAD&st=commit&s=genisoimage

this only searches the commit comments.

thanks