Missed a few steps there....
With the rpm command, you install the source code packages. Then you have to compile.
I'm not proficient in this, but the steps include "make menuconfig", "make", and "makeinstall". You also will have to make a new initrd.img
If none of this rings a bell, then go look at some docs on compiling the kernel. This one looks promising:
http://www.digitalhermit.com/linux/K...ild-HOWTO.html