I have a net drive letter that conflicts with some removable drives, and
changing the net drive is problematic.
Could there be a way to automate the reassignment of a local drive letter?
Unless you have tons of removable drives to deal with,
using Disk Management should do you work.
I just tried with my USB key.
When I plugged it in, XP usually gives me F: as the drive letter.
Then I go to Computer Management | Disk Management
and change the drive letter from F: to G:.
Next time I plugged in my USB key, it stayed as G:.
If the Disk Manager does not do what you want, you may try
d/l the cmdline util diskpart.exe from Microsoft. Google for more
info.