I am looking for a little guidance... I have a Macbook Pro with 4 GB RAM and 2.4GHz Core 2 Duo running 10.5.6. I haven't updated to 10.5.7 yet. Parallels is on the latest version. My question is.. Is there a way to run 2 VMs simultaneously and keep them both running quickly? I am running XP SP2 on one and Win7 on the other. I have a need to run both at the same time and the performance just drops off the table. Running one at a time runs just fine on either VM. Are there some settings I should adjust? I have 1 GB RAM assigned to each. I have 1 processor on each machine and Adaptive Hypervisor is ON. Any help would be appreciated.