One more thing: my next Wine try will be a straight Wine install, where it's not referencing a Windows Partition at all, and instead is just running pure 'Wine'. This, as I said, is more work, so it will be a while before I'll be able to look serously at it. But if it does work out, then that means that you can run Revit with no Windows Partition present.

Another big issue is that I beleve that Wine supports Windows 98 more than NT/2000/XP, but I could be wrong. With Revit going over completely to 2000/XP within the year, a working Wine install for 5.1 might not work for whatever comes next.