Windows will not boot

earlier today, I pretty much ruined my installation of ubuntu, by updating my flash plugin. It removed my theme, browsers, and some other programs. I decided the completely reformat the hardrive ubuntu was installed on (XP being on separate hard disk) to ntfs, and reinstall ubuntu. After I backed up my files, I booted into XP. then I tried to reformat the drive, but XP only recognized 437 gigabytes of hard drive space (the one ubuntu resided on), when the entire drive is 466. (I gave ubuntu 30 gigs) After looking through the seagate disc wizard, I found the only way to completely gain the hard drive back was to boot into ubuntu using the LiveCD and deleting the ext4 partition that ubuntu used. After deleting the ubuntu the ext4 partition, I was unable to format the 30 gigs into ntfs. It was then I realized that my bootloader, GRUB2, was inside the ext4 partition, with Ubuntu. I had just deleted my bootloader. The end result is not being to load the XP kernel after starting up, I just get a flashing underscore on the top left corner of the screen. I've gone into the BIOS, everything is as it should be there. I would do a repair of XP, but unfortunately my xp disc is a pirated copy, therefore I have no idea if it would help or not.

I need to be able to regain the task of booting xp.

Please help!!!