I am not aware of any plans for a Vista-64 version. AFAIK, the 32-bit versions of Modeling PE run just fine on 64-bit operating systems. Also, with the current limit of 60 parts in the free version, a 64-bit version isn't really needed anyway. The Intel integrated graphics chipsets (or rather, their associated drivers) are unfortunately notorious for causing problems in Modeling PE. You can find some previous discussions at <ul> <li> http://apps.cocreate.com/OneSpaceModelingPE/Secure/Forum/forums/thread-view.asp?tid=362 <li> http://cocreateusers.org/forum/showthread.php?t=6785 <li> http://apps.cocreate.com/OneSpaceModelingPE/Secure/Forum/forums/thread-view.asp?tid=372 </ul> A workaround is described in the second discussion in the list above.