Want to install Windows XP via Bootcamp for gaming. I have a 2011 MBP 15", 6G RAM, Matte screen with 128G SSD, so space is valuable until SSD prices come down. I will keep pictures, unused videos and music on an external HD. What is the minimum Windows partition size I'll need for XP and a few games. I know it depends, but can anyone offer any thoughts what would be a minimum partition size?