Im new at using a Mac, and I've been working for a few weeks trying to figure everything out so I could partition my drive to use windows for the new Star Wars: The Old Republic game. I have successfully partitioned my drive with 30 GB for Windows, but windows took 10 GB, and the game takes 20GB. So I erased the partition and am trying to add more GB. I could go up to 50 GB and still be fine, but i keep getting this message when I try to do it: The disk cannot be partitioned because some files cannot be moved; Back up the disk and use Disk Utility to format it as a single Mac OS Extended (Journaled) volume... I understand what i need to do, but it won't let me format my drive. I have a Macbook 5.2. How do I go about getting this to work? How can I partition my drive to at least 40GB?