The fact is that revisor call pungi and then mkisofs. The last fail because there is no isolinux directory. I do this manually, but the generated iso, didn't launch anaconda. May be I make some mistakes.
You can remove packages from the CD1 copy, if you don't break dependencies. Then you must run "createrepo -g repodata/Fedora-9-comps.xml ."
Cheers, Gabriel.