Hello ChoboSeki, Sorry to take so long to respond...work. Program I am working on is 2008 version of Autocad with a demo version of 3-D cadmech. I'm told the demo version[free] is no longer given out. I'm just trying to teach myself this stuff and not quite ready to shell out thousands for the real programs. My hope is to load my 32 bit Vista behind my new 64 bit W-7 and boot from vista when I want to work on CAD. I seem to be seeing that it is possible to partition my drive and load vista but not quite clear on whether both OS have to be the same bit. Also I think it would be sweet to have my vista boot on a different drive, and use exclusively for cad.