I would try asking the tech support peeps on Virgins support newsgroup:
virginmedia.support.broadband.cable
Setup instructions for outlook express can be found here:
http://www.virginmedia.com/customers...ress-exntl.php
You might get lucky and get someone to post back here. But the last time someone reported back with the status of an UBR, they got loads of other requests asking to check more UBR's on the network.