[CentOS] User Mode Linux and the CentOS 4.0 Kernel

Does anybody know where I might find a stock standard ready rolled 
binary CentOS Kernel (2.6.9-5.0.5.EL) rpm package BUT with the skas mode 
uml (user mode linux) patch applied ?

If not I will try and build one myself......gulp.... ;-)

Is there any good howto's out their on how to do this? It all appears 
very different with CentOS 4.0 and the 2.6.9-5.0.5.EL.src.rpm.

Cheers

Bill