My friend wants to know if he needs to upgrade from 4gb to 8gb on a 15" mac book pro i7, 2.2ghz, 5400rpm drive using Parallels 6 or VMWare Fusion for Windows 7 install. He was not happy with the speed of VMWare Fusion and was planning on buying Parallels 6 along with memory upgrade from Crucial. Does he need 8gb of RAM or is that overkill? He only needs to run one program( SAS Business Analytics software ) on Parallels. He had already ordered OWC 6g SSD Mercury Extreme with data doubler. Thanks/ Thanks.