[rhn-users] How do remove the 'old' RH8 kernel shown on the bootup screen?

[Tom <tomh simas com>]

Using red-carpet, I've upgraded my RH8 kernel.  At bootup, I now have 2
RH8's listed.  How do I remove the old one, and anything associated with
it, all the while keeping the new version (and anything associated with
it)?