Running an older (2007) White macbook. Has the 2.0ghz C2D with 4 GB (3 recognized) system memory. Upgraded to a newer 250gb 5400rpm HD and the VMware fusion unity is still a horrible experience. Trying to run Visual Studio on the win7 platform. OSX is snow leopard, fully updated. I've installed VM Tools and I'm giving the VM 2 GB of my memory. What else can I do to boost VM performance, short of installing a SSD (not worth it for a 400 dollar laptop) Would running the VM off an external help things? Is OSX able to use that last 1 GB of RAM after giving the VM the first 2 or does that still do me no good?