Do yourself a big favor and don`t attempt to upgrade your kernel if everything is working fine. There aren`t enough differences between different versions of Kernel 2.4 to be worth the headache you`ll surely get attempting to mess with your kernel and I wouldn`t reccommend using a beta kernel. Wait till Redhat comes out with an updated kernel on RHN that is allready prepackaged.
Don`t mess with your kernel if you don`t want this
And don`t use an odd numbered kernel or pre-kernel unless you like being a guinea pig.