Well this is probaly not going to be simple but hey here is a nice challange for you guys. If possible it would be great if youy could select the cpu (core to use on multiple cpu systems I.E Mac Pro with 4 cpu's) the option would enable better system performance and boost the host and guest operating systems performance by a huge ammount. I appreciate mac os x is great with multitheading but if you could selct which cpu to run a guest os from (the one with the least load) the os's will fly. !!!! (even more than they do already). I appreciate this is a massive task but it would be amazing imagine running vista on 1 core, Linux on 1 core ans os x on the remaining 2 cores. I will love you guys for ever if you can do this !