osascript to set secondary desktop background? I have been using this:

&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;!DOCTYPE plist PUBLIC -//Apple Computer//DTD PLIST
1.0//EN http://www.apple.com/DTDs/PropertyList-1.0.dtd&gt;
&lt;plist version="1.0"&gt;
&lt;dict&gt;
 &lt;key&gt;Label&lt;/key&gt;
  &lt;string&gt;com.filmscoring.display.plist&lt;/string&gt;
 &lt;key&gt;ProgramArguments&lt;/key&gt;
  &lt;array&gt;
    &lt;string&gt;osascript&lt;/string&gt;
    &lt;string&gt;-e&lt;/string&gt;
    &lt;string&gt;tell application "Finder"
set f to POSIX file "/Library/Desktop Pictures/mac cinema desktop yoda.png"
if desktop picture is not file f then set desktop picture to f
end tell&lt;/string&gt;
  &lt;/array&gt;
 &lt;key&gt;StartInterval&lt;/key&gt;
  &lt;integer&gt;10&lt;/integer&gt;
&lt;/dict&gt;
&lt;/plist&gt;


To prevent users from changing the desktop. (And I love it btw!) Original can be found here: How to restrict changing desktop wallpaper?

All of our stations have a secondary screen which I'd also like to fix up the same way using a different image.

Any idea how I can target the secondary display with this code? Thanks for the help!
Quick Google search revealed the following code:

set tlst to {}
--set newtop to (path to home folder as string) &amp; "Pictures:desktop pics folder:BigDipper 916.jpg" as alias -- sample line
set newtop to choose file


tell application "System Events"
   set tlst to a reference to every desktop
   --set picture of item 1 of tlst to newtop -- display 1
   set picture of item 2 of tlst to newtop -- display 2
end tell


Taken from

http://macscripter.net/viewtopic.php?id=35840

I don't have a second monitor so I cannot test it. 

Hope it helps.