Using the following 2 threads as guides, I updated my OS from RedHat 9 to CentOS 3.6 the other day, which went pretty smooth.

http://forums.cpanel.net/showthread.php?t=34073
http://forums.cpanel.net/showthread.php?t=24675


On the web somewhere I found a post with this info on the RedHat -> CentOS upgrade:
After that upgrade is done, you still need to clean up the distro.

Basically, you will want to run the command:

rpm -qa --qf "%{name} - %{vendor}\n" | grep -i "red hat"

and any packages that are still Red Hat, Inc. for vendor need to be replaced.
I ran that command and there are a number of packages that are still "Red Hat, Inc."

How can I "replace" them, short of removing them and re-installing them from yum? That I can tell, there is no force update or force install option for yum.

I read on a post somewhere that removing them from the installed RPM database is enough to trick yum into reinstalling them, but I'm not sure how to do that.

Anyone have any advise on replacing the left over Red Hat packages with the ones from the CentOS ditro? I know they are probably fine left alone, but all the same I'd like to have as much of a normal CentOS install as possible and not a half breed