I installed fusion on my iMac because of the plethora of DVD back-up tools on windows, and I already had Office 2007 which I use frequently. I am now thinking about playing a few games, which would probably best be done in boot camp. It is my understanding that fusion works better as an image and not when running off the boot camp partition (per VMWare), and am not really worried about hd drive space of having a boot camp partition and a fusion image. Does anybody else do this?