This may not be possible. The latest kernel for RHEL 5 is 2.6.18-194.11.3 (just released in the past couple of days). Around 2.6.30 or 32 there were major kernel structure changes. You would essentially have a completely new system and would have to replace all system tools, drivers, applications, libraries, etc. If you want to run the kernel you mention, then you will need to update to the latest Fedora Core - you will not be able to install or run it on RHEL as far as I can tell, and it certainly would NOT be supported by Red Hat.