I think you can set your external drive to be the same Drive letter everytime on whatever system you connect with. If you set your drive letter assignment to a higher letter that won't interfere with any system you are using it on there should be no problem. I have mine set to K: (get it, Karaoke)
I know that if you are using it on a system that you've never used it on before you would have to assign that letter initially. You could pick drive Z: if neccesary and surely no other system that you would be connecting to would already have something assigned to that letter.
Wally
