[Centos] RHEL 4 => CentOS 4

[seth vidal]

> > 
> 
> Unlikely, the best approach is still going to be to use Anaconda, as 
> Johnny has said.

There's another good reason to anaconda-upgrade - the kernel changes
that go on mean a lot of various disk things have moved around, too.
Like selinux settings and lvm type has gone from lvm1 to lvm2 - this
requires some edits to your partitions. Yum doesn't do these changes
b/c, well, it's not what yum does.

-sv