Okay, so I decided to install Windows 7 on this laptop that already had XP on it. I wanted to dual boot and get rid of XP after I made sure that 7 ran correctly. I just deleted the XP parition and resized the Win 7 partition, and I guess in the process I deleted the Windows Boot Loader.
I figured all I had to do was boot the Windows 7 disc and reinstall 7, but it's not loading the disc. It says that it can't find anything to boot or some shit. How do I fix this? I have the Ubuntu LiveCD that I can boot if I need.

Please help, it's my mom's laptop.