I want to play Starcraft 2. I have a Macbook with OS X 10.5.8, 2.2 GHz Intel Core 2 Duo processor, 1 GB 667 MHz DDR2 SDRAM memory, pretty strong wireless and/or ethernet connection, and a NVIDIA GeForce 320M graphics processor. My friend gave me a trial version of the game and although I was able to run it, it was very laggy and glitchy. I want it to run smoothly and don't care about the graphics quality. Would I need a better graphics card, and if so is there a cheap one I can find? Could I install it myself, knowing next to nothing about computers? Or do I just need more RAM, and ditto about installation? Thanks for your help.