I no longer use ubuntu anymore on my laptop, so I decided to do away with the partition. Only problem is now I cannot boot into Windows Vista. I'm assuming the problem is with the MBR, but I honestly don't know too much about what I'm doing, and I'm not too sure where to go from here. I'd like to avoid a complete re-installation of the OS if at all possible.
[Grub had taken control of the dual-booting process and you should have removed it before uninstalling Ubuntu by editing the file menu.lst. Run Ubuntu as a LiveCD and see if you can find that file. If you can't, your Vista DVD should be able to repair the startup.
I tried to repair the startup with my Vista DVD, to no avail. I'm not quite sure what you mean by running Ubuntu as a LiveCD. I didn't install Ubuntu with a CD, I used a USB drive if that makes any difference.