ah, never fear montnoir, the tech forum is here. This one is as easy as pie
>Start button>>Control Panel
>>Administrative tools>>Computer Management>>Disk Management
Your drives will appear on the right
>>click on the hard disk with a blue horizonal bar, the box should be shaded
>>next right click that box that you desire to change the letter then click on "Change Letter Drive and Path"
>>click the "change..." button
>>from the "assign the following drive letter", select the letter you want to assign to the hard drive or the cd-rom drive >>click ok
You can not:
*change the drive letter of your boot or system drive this way.
*assign drive letters that are already in use >>Assign temporary letters as a workaround and then change back to the desired letter
pic for illustration: