recently I setup rockscluster 5.3 with oel 5.4 on vbox, frontend and one compute node.
my host run w7-64bit
frontend: eth0 internal, eth1 bridged and fix IP
compute node: eth0 internal
I use OEL 5.4 instead of centos
I could not use eth1 in NAT for some reason
By using bridged NIC, one can use scp to transfer files to VM