I'll bet, if you had a quad core processor with 4 gigs of ram and a killer video card, VB would run Sims. But no, Sims is design to run on systems with 2 cores and more than a gig of Ram for good results. VB splits the machine up so much that is severely cripples any performance from the guest OS.
Intel DP35DP MB; Nvidia 440 2 gig Video Card; 8 gigs of ram; Intel Core Duo 2.20 gig; Hp Officejet Pro L7580; LVM F18 64bit using 3 320g HDs and a nice LG 22 in. Monitor.