Hi!
probably most of you know this already.
I was always looking for the glue between the cpan and rpm
packages, and
http://perl.arix.com/cpan2rpm/
looks really nice, and it helped me now several times
(it’s not the perfect solution), but to build a recent
version of SearchBuilder it is quite good.
So it helps you do package the trillions of dependencies of RT,
and you don’t have to use the evil CPAN packages 
regards!
sven