I have one partition on my harddrive and that has Windows XP installed on it. I want to install Vista on the same drive. Since the partition has used up all the space on my harddrive, is there a way I can take the extra space off that partition and use it to create a new one? If so, how? Also, if this is possible, will I be able to delete the new partition and join it back to the original one if I decide to later?