Hi guys,
just to drop a line here, check at:
people dot redhat dot com/davej/kernels/Fedora/FC5/
I've got some errors trying to install kernel source via package manager too, but when I downloaded srpm & rpm from this guys site and installed manually (rpm -i ) everything went smooth.
Hope that helps.
PS The url is not quite an url, as it seems I haven't got the right to post links yet or smthng like that