Thank you for all of your assistance with this. You gave me some ideas to try. I was not having much luck finding any utilities that would allow me to update the Operating System's classification of the drives, nor was I able to find a clean, easy registry update to get what I want.
The drives are external USB hard drives, and most of them are not easily accessible at the moment. I don't want to purge the data from my database. If I need to search for an image I can search the drive, but I don't need to go physically get it unless it contains something I need. That being said, I took the next logical approach.
I use MSSQL for my Thumbsplus database. I looked at the data in the Volume table and changed the vtype values for the drives in question to match removable USB drives and now everything is listed as I want. The active drives are ordered by their drive letter, and inactive drives are listed alphabetically as offline.
There is only one side affect that I have noticed so far. Thumbsplus views an Active Drive as a New Drive and lists the Active Drive Volume as offline. This is easy to correct by simply changing the vtype back to 3 (Local Fixed Disk)
I really appreciate all of your assistance with this! I will let you know if I make any further progress. Thank you, very much!