Anyone know of a good optimization guide to get the best (1) battery life and (2) performance out of Parallels 7? I'm getting my first MacBook in a couple of years, and back in 09 when I used Parallels 4 or 5, running it just ate up a notebook's battery life. Curious as to the best settings to get decent performance running Windows 7 under Lion on a 2011 MacBook Air 13 with 4GB. Searching for optimization didn't turn up anything very recent, so curious as to whether there's a guide/wiki/etc. with tips on the best things to enable/turn off to make Parallels run as smoothly as possible while maintaining decent battery life.