Hi Justin
Many thanks for the detailed information - really appreciated. I really need my primary machine running under Windows so I guess I need to mess around with W2K8R2 (but its a shame if I have to regress the OS to get it to work - just bought a Myricom 10gb card just in case) but I have a spare card or two so I'm going to brush up on my not very good Centos skills and give your instructions a bash!
Cheers
Drew