I have a stock plastic macbook from 09. 2 gb ram 667 and 2 ghz core 2 duo on last version of leopard. Parallels runs OK but my apps load slow and take long time switching, after a day or two especially going sleep/wake up cycles VM starts slowing down a lot need to reboot it. Will upgrading to snow leopard and 4 GB ram solve this problem? This will set me back at least $200 so I need some good info to make a decision. I need to buy new RAM, snow leopard and new version of parallels plus do a complete backup and waste probably a day doing the upgrade.