Well, that took significantly longer than I'd hoped, but we've finally moved servers. Ironically, the thing that I thought would take longest - copying the data - was the shortest and simplest part of the operation; getting the machine working in VMWare was, by comparison, a fucking nightmare. Don and I spent a good couple of hours trying to figure out why networking wasn't working... until I swapped the WAN and LAN virtual network adapters around and everything started working. Doh.