Control Panel - System Properties - CDROM - click on drive - properties - settings - Reserved drive letters - change it here in this section - Set both upper and lower bound to for instance, "R" -it will then stick with that drive letter, changing to it on the next boot.


Never tried it to see if it will stick and push new drives above it, for the reason stated above - just wanted to get them out of the way, and given a fixed drive letter for batch file purposes, links etc.