Possible to change mouse sensitivity with automator?

OK, found a nifty applescript for this. Just change the 5 in the first line to 0-9, depending on what you want to set the mouse sensitivity to be. I created another script which increases mouse sensitivity. Then I created a hotkey combination to change my mouse sensitivity settings very quickly based on which mouse I'm using.

If you don't know how to set this script up, follow the instructions in this helpful comment here: https://discussions.apple.com/thread/2488007?start=0&tstart=0. But instead of having the application run in just iTunes, as the comment suggests, have it run in "all applications."

Here's the script:

set trackingValue to 5
--Open and activate System Preferences
tell application "System Preferences" to activate
--Attempt to change settings using System Events
tell application "System Events"
    tell process "System Preferences"
         try
              --Open the "Keyboard & Mouse" pane
              click menu item "Mouse" of menu "View" of menu bar 1
              delay 2
              set value of slider "Tracking Speed" of window "Mouse" to trackingValue
              --end tell
         on error theError
              --An error occured
              display dialog ("Sorry, an error occured while altering Keyboard and Mouse settings:" & return & theError) buttons "OK" default button "OK"
         end try
    end tell
end tell

I upgraded to Lion and the script broke. Ugh.