Untitled

tell application "iTunes"
        set sel to selection
        if sel is {} then
                display dialog return & "No tracks are selected..." buttons {"Cancel"} default button 1 with icon 0 giving up after 15
                return
        else
                set selR to a reference to sel
                repeat with t from 1 to (length of sel)
                        set thisTrack to item t of selR
                        set albumName to (get thisTrack's album)
                        if albumName starts with "200" then
                                set thisTrack's album to (items 6 thru (length of albumName) of albumName as text)
                        end if
                end repeat
        end if
end tell