|There is no such think as xp pro 2007. There is the new version of windows called Windows 7.|
To advise you on deleting the xp install we need to know the following;
Where is each OS installed?
Is this a single drive with a single partition or one drive with two partitions and you installed 7 to the 2nd partition?
Or do you have two drives and 7 is installed on the 2nd drive?