[Users] Installing oVirt with existing VM

[Webmaster Comune di Busto Garolfo]

Hi all, i'm new at this list and ovirt too!

I'm looking at something to manage my vm and i found ovirt.

The situation:

Host: Centos 5.7 x86_64 kvm (intel)
Guests: 2 * centos 5.7 i386

I can't find much documentation about, so i have a lot of doubt.
Can i install ovirt to manage existing guests?
Can i install ovirt on another machine (i've a centos 6.3 x86_64) and 
manage the one with kvm as a node?
What are the steps to do?

Thanks in advance and excuse my little english.

Forlani M.