content: #uncheck every second track and check the others
  
  tell application "iTunes"
  	set the_selection to the selection
  	set i to 1
  	repeat with each_song in the_selection
  		if i mod 2 = 0 then
  			set enabled of each_song to false
  		else
  			set enabled of each_song to true
  		end if
  		
  		set i to i + 1
  	end repeat
  end tell