preserve pxelinux.cfg ?

Is it possible to have cobbler not blat pxelinux.cfg but merely add to it or delete from it? We have a situation where the same build box is needed to PXE different systems, jumpstart etc, but i dont want to not be able to use cobbler. Anything that gets added into there not by cobbler gets removed when a sync is run. Any ideas on if this could work? thanks