Hi Jack,
Click start/run, type diskmgmt.msc and click ok. Right-click on the drive to
be changed to begin.
Note that you cannot change the drive letter assigned to the system
partition, that is fixed. The only way to change this drive letter is to
start again from scratch.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Associate Expert - WindowsXP Expert Zone
Windows help -
www.rickrogers.org