Hi, I'm using Adobe Lightroom 3.3 and find the MBP 13" 2010 with 4gb ram, 10.6.6 and the 5400 rpm slow for a smooth workflow. The mouse freezes for about 5 seconds when I export one 12 megapixel file in Lightroom. This did not happen with my old Dell M1330 laptop specced at Core 2 Duo 2.2GHZ, 7200rpm, Win 7, and 4gb Ram. I have a spare 320gb Western Digital Scorpio drive 7200rpm. I would like to know if the 7200 rpm drive will be noticeably faster before I remove any screws on the MBP. I've heard 5-15% on some forums. I am considering this option until 256GB SSD drops to about $400.