Illustrator Scripting :: Recursive Loop Through File System

I'm trying to figure out if Javascript is my answer to my problem.  I've been able to re-write all my Applescripts that manipulate Illustrator except for the ones the need to use the file system.  We have switched to PC's at work and now I'm forced to figure this out.  Our art files are saved with a 7-digit number, followed by the name of the art in the file.  Ex:  1000049-Bob's Garage.  My applescript had a recursive loop that worked it's way down through the file structure on our art server until it found the lowest folder to which it belonged, then saved itself there.  Here's an example of how the server file structure (these are folder names) is layed out:
 
1000000-1004999
1005000-1005999
1010000-1014999
 
and so on.
 
The script would load all the foldernames in the first tier of the directory, loop through them and look at the first and last name of each these folder names, then compare the Illustrator filename to them.  If my file was between the two, then the loop called itself, loaded the folders inside that folder, and by doing so, worked it's way down through the folders, through the tree structure until there where no more folders.  At that point, the file was saved, in order, where it should be.