If you are going to reformat than back up anything you don't want deleted first. Then it is a simple amtter of reinstalling Windows. When you get to the point of selecting where you want to install, be sure to delete the extra partition, then reformat the full disc, and install.
Another route would be to use Patition Magic and delete the extra partition, and then merge it back to your original install, however, since I do not know exactly what the service pack install did, or why it created another partition, I would advise caution when doing this if you haven't backedup you data first. Of course you should ALWAYS back up things you don't want lost before doing ANYTHING tha thas to do with moving, resizing, merge, deleting, etc...partitions.
Another route would be to use Patition Magic and delete the extra partition, and then merge it back to your original install, however, since I do not know exactly what the service pack install did, or why it created another partition, I would advise caution when doing this if you haven't backedup you data first. Of course you should ALWAYS back up things you don't want lost before doing ANYTHING tha thas to do with moving, resizing, merge, deleting, etc...partitions.
