Hi Guys! I've been reading some of your posts here. I'm a recent Massive user. We had the chance to work on a commercial which needed a couple of massive shots. At first it was quit difficult to understand how the software worked but after doing a lot of research I managed to get my Massive scenes rendered with Sytex AIR. Great render engine, very intuitive and a preview window which pops-up right away in massive when you hit the preview button.
All these with a Massive Prime license and a 4-node Air license on Windows XP 64. So dig into Massive and Air and you'll have great results! All the best!