[Centos] Upgrading FC2 -> Centos4RC1 (possible, but messy)

Matt Bottrell wrote:
> I'm constantly surprised how many people wish to 'upgrade'.
> 
> Historically I've been updating my Linux distro when Redhat still was
> shipped in nappies.  I've learnt pretty early on the following:

[...]

> 4. Choose to install fresh (not upgrade), and format the existing
> partitions /, /usr, /tmp and /var....  whilst you probably wish to
> keep /usr/local and /home.

Matt: I agree with you, fresh installs are my preferred "upgrade" path.

But I was just curious what to do in a remote server situation? I manage 
about a dozen boxes remotely. They are running CentOS3.3 right now. When 
CentOS4 becomes final, I would like to upgrade. But not sure if there's 
a way to do it "fresh" since I'm not at the machines physically.

Along the same lines, does RedHat themselves have an official position 
about upgrades from RHEL3 to RHEL4?

johnn