Hit the Cent mailing list and see if one of the devs will build the package for you. You could also try to compile it from source.
I would set up a test machine, and do it from there thou. Also give the pclos rpm a go on the test machine. You might get lucky, as there is a good bit of red hat code in pclos/mandy.
I will try and find you a link to a site one of the pclos devs put up from the work he did on it.
Here is the script generator. Once you set up everything like it should be for cent getting everything pointing in the right place, save that script. Then running it will get it done for you.
You still need a working mklivecd install thou.