READ THIS WHOLE THING BEFORE YOU ACTUALLY DO IT!!!! YOU MAY DISAGREE WITH THIS IF YOU ARE IN THE MIDDLE AND HAVE ALREADY ERASED!ok i know what to do, but u need to back up ur files onto ur time capsule, clearly you have one. ok so, insert your mac os x disc after ur backed up. boot from the disc, and then click continue and then at the menubar click utilities. select disk utility. go over to ur hard drive (not macintosh hd) and click on the partition tab. youre then going to click the drop down where it says currect,and ur gonna select 1 partition. name is Macintosh HD, and then click the drop down and make sure u select Mac OS Extended (Journaled). then click partition. ur gonna lose all ur stuff but thats why u have the backup. next install mac os x on macintosh hd again. once thats done, go to bootcamp and make the windows partition. go back to time machine and restore your computer from when u backed up. dont worry, this wont affect ur windows partition. 😉