I have been running LFS in a Parallels 5.0 virtual machine for about a month. Seems to do alright. But I am running into some problems where running the FBM cars the frame rates get down to about 10 fps and makes it undriveable. Any virtual machine experts out there have any hints or tweaks to LFS options to make the frame rates above 50 FPS?

iMac Late 2008, Snow Leopard, 2 GB, 2.8Ghz Core 2 Duo
Parallels 5.0, WIndows XP SP3