Which version is on the first partition? If 2000 you can also use a free one like GParted nnot only for deleting the 2000 primary but in moving the second primary forward. That takes forever depending on drive size however. You would be better off increasing that partition in size after backing things up. Once done you will also need to boot with the XP cd to the recovery console and enter the "Fixboot" and "Fixmbr" commands to see a new mbr written for the remaining Windows.