I have a mid 2008 15 inch MBP (last model before unibody). I currently have 1GB of RAM in each slot (dock, etc. I don't know the technical name for them). I have heard that the most this computer can handle is a total of 3GB of RAM. This leaves me with two questions: 1. Is there anyway to allow the computer to use more RAM if I installed it (like a total of 4GB or something?) 2. If it's not possible, is it worth it to upgrade to the 3GB? I've noticed that my laptop is running a little slower and can have less programs open at once before slowing down since I upgrades to Lion. I've got a 2.5 GHz Intel Core 2 Duo with 2GB 667 MHz DDR2 SDRAM. (I'll be honest in that I don't know everything that all of that means). I just want to see how much faster and better I can make this thing as getting a new laptop won't be happening for at least 2 years. Thanks.