I was looking for someone elses solution, but it was not here.
There are many ways to fix the problem. First if you can make an NT boot floppy from a similar machine, do so, and use it to boot into Server 2003. You can then edit the boot.ini file under that system partition (boot drive), and include additional menu choice using the XP's boot.ini drive path.
Second, and perhaps simpler, is to boot into XP, and read the Boot.ini file from the Server 2003's system partition (boot drive -- likely C:\ ), then look at the boot.ini file on your XP system partition and do some merging of the two. To create a dual boot menu.
Third, use the 2003 Server's installation CD, and go into the recovery mode. From the DOS prompt, there is a command -- I cannot remember, which should fix your problem -- I am not sure if is "fixboot" or "fixconfg" or similar -- since this is what I was searching for when I encountered the dual boot problem as stated here.