Is it possible to force ALL types of USB Memory sticks to use a specific
drive letter regardless of which PC they're plugged into?

E.x. At the moment we've had to permit users read/write access to drives
D/E/F as some PCs have CD-Roms, some have CD-RW+CD-Rom and some have neither,
meaning the USB memory stick takes the next available drive letter, can we
force it to use drive G: for example regardless of what brand of memory stick
is installed and what USB port it's installed into? (Assuming of course that
drive G: does not already exist)

We use Windows 2000 SP4 and Windows XP SP1a on an Active Directory 2003
Domain.