I just recently got the White Polycarbonate Intel iMac. I have looked at some sites describing how to get into this iMac's internal components. They say that I have to unscrew some screws on the bottom first starting with the memory cover, and then unscrewing the other screws. I got the memory cover off fine, but the other screws seem to have different shape, they're not Phillips or Flathead, they have more of a starry shape. Has anyone gotten inside this iMac and if so what screwdrivers did you use? Thanks for your help!