the RPMs should just be on one of the CDROMS in a directory called RPMs. At least it's that way with Mandrake. if not poke around, there be rpms there!
Second - why Mozilla won't install is beyond me. try just downloading and installing it from their web site. I think the installaition's pretty easy...or even get the tar.gz, open that up, and compile it.
What files does it say aren't there, btw?