AppleScripting System Preferences

Hi everyone,

I would like to create an AppleScript which enables/disables the Mission Control shortcut key combo. I have gotten so far

tell application "System Preferences"
  activate
  set current pane to pane "com.apple.preference.keyboard"
  reveal anchor "shortcutsTab" of pane id "com.apple.preference.keyboard"
end tell
tell application "System Events" to tell process "System Preferences"
end tell

This successfully opens Sys Prefs and switches to Keyboard/Shortcuts. But I don’t know what to do from here. How do I select Mission Control in the left part of the window and how do I select/deselect the corresponding Mission Control entry on the right?

The reason I want to create this AppleScript is that I sometimes play games. If I forget to disable the Mission Control shortcuts (ctrl + arrows) before launching the game Mission Control interferes with the game’s controls which results in me switching away from the game inadvertently. Some newer games circumvent this problem by adding themselves to the list of assistive devices. But you’re out of luck with games that don’t offer this. So I want to create an easy way to switch MC’s keyboard shortcut on/off.

Any help is appreciated!

Björn