Not really a direct answer (I'd wish I were a LiveCD/USB expert to
help out), but maybe these questions are better targeted at the real
experts gathered at fedora-livecd-list? See
http://www.redhat.com/mailman/listinfo/fedora-livecd-list
Some are certainly on this list, but your questions may get lost here
in the higher volume list.
--
Axel.Thimm at ATrpms.net