Applescript, how can i sort files by the way they start?

Question

I have a folder on the Desktop called "HotFolder" This is where all the images are stored.
They are uniquely named (either jpg's or PSD's) They begin FR10xxxxxxxxxxxx ES20 TM15 etc, Each of these refer to image type.
On the Desktop there are folders named FR10_WK10, ES20_WK10, TM15_WK10
Each week the folder name changes but only the digits after WK10 So the first 4 digits are consistent.
I'm looking for an applescript to sort these files so it sorts all files beginning with FR10 to go into folder  that begins FR10 and TM15 in to folder that begins TM15.
I've very little experience with it applescript, only good and modifying it after. So if anyone can help me out with this it would be much appreciated.
Many Thanks

Answer 1

Jacques Rioux wrote:
MattJayC wrote:
I get the response
error "Finder got an error: Can’t get 1." number -1728 from 1 to «class furl»
I think that it might not work as the folder name doesn't always start with the same ie
Yes, the folder doesn't exist.
Here another approach
tell application "Finder"
    set theHotFolder to folder "HotFolder Copy"
     move (files of theHotFolder whose name starts with "BU") to (get first folder of desktop whose name starts with "Bugess2do")
     -- this moves every "TM...." and "CC...." files  to folder "TM15...."
     move (files of theHotFolder whose name starts with "TM" or name starts with "CC") to (get first folder of desktop whose name starts with "TM15")
     --- another example
     move (files of theHotFolder whose name starts with "FR") to (get first folder of desktop whose name starts with "FR10")
     move (files of theHotFolder whose name starts with "ES") to (get first folder of desktop whose name starts with "ES20")
end tell
Add  lines for other name.
SUPERB WORKS LIKE A DREAM!!!!!
Thankyou