Can I use the RAM from a new 2012 13" MBP in a mid-2009 13" MBP? I want a cheaper upgrade of the new MBP (compared to apple's price for a 8 GB upgrade) and upgrade my old MBP simultaneously. I have read that DDR3 RAM will run at the speed of the controller, as long as it is <= to the speed of the RAM, but this is a big jump (1600 MHz -> 1066 MHz). Anyone try this?