I am in the frustrating position of having to buy a brand new Windows XP disk to use on bootcamp, even though I have a perfectly good one already that just doesn't happen to have Service Pack 2. Leaving any more discussions about Microsoft ripping people off for the time being, is it possible to buy an OEM disk (for about £50) instead of the 'proper' version (around £150?) I don't even know what OEM means, except that apparently it is meant to be used for system builders only.......are they the same in essence?