[CentOS] Where is the kernel source code???

> yum -y install kernel-source

there's no kernel-source rpm in rhel4/centos4

just the src.rpm - which you can use just fine.

Don't bother building a new kernel, the centosplus kernel is mostly 
modular anyway so everything you don't need doesn't end up in RAM 
anyway...

Cheers,
MaZe.