Changing the Path of an External HD

[LittleAtari]

I was using two external hard drives (one connect via USB, the other was FireWire) to transfer files between them. Before, I used to connect the USB HD by itself and it would show up as drive 'E'. However, when doing this, the FireWire drive became drive 'E' and the USB HD became drive 'F'. Now whenever I reconnect my USB HD on it's own, it shows up as drive 'F'. My problem is that the USB HD stores a lot of path sensitive stuff and so this messes everything up. Is there a way to change it so that it is by default drive 'E'?

Thanks in advance.

[Kariudo]

in XP:
right click my computer and select manage
or
start-control panel-administrative tools-computer management

select disk management
right click the disk you want to change the path of (select change drive letter and paths)
change the disk label to whatever you want, you may have to connect the firewire drive and change that path first.
You'll need to restart before any changes are made

[LittleAtari]

I was able to change the path. Thanks a bunch.