I took a look at CentOS recently and was amazed, but I also remembered dabbling in Fedora when release 16 came out and recall being horrified by the awfulness of rpm. I cannot stand anything other than ubuntu's package management system. Seeing rpm again in such a good setup as CentOS though, got me thinking again.
Can you change the package management system? Or is it in the core and require rebuilding the entire OS?
Please don't answer with "You can uninstall synaptic and use USC", I have no in depth knowledge of package management but I'm not on about using a different GUI or something. Is it possible to do the above and make rpm's native on ubuntu or deb's on fedora (and I don't need to know about Alien either, which converts deb's to rpm's and vice versa).