Thanks. This has been very useful. I have also been researching around and it looks as mentioned above that Workstation and Fusion can both do 8 gb. Virtual Box was one I was trying to think of but couldnt remember the name of so that was extremely helpful. I havent been able to find the memory specs of Virtual Box though. Our IT people are helping me as of today. The practical hints like not assigning more than half of the machine memory are very useful. The current Linux box we are thinking of trying it on has 64 gb RAM and the Mac has 16 GB. The Solaris has 256 GB of RAM although we beat that pretty hard and sometimes run out of memory while the Linux machine and Mac are underutilized. We could always dedicate a linux box with 64 gb of RAM to this to allow multiple 8 gb virtual machines based on the comments above that might make sense. I just hate to sink that much money in a Windows machine for just this app which is why I really am interested in the virtual machine aspect. Thanks again.