How Do I Customize the Key Combination to Cycle Through Windows in Reverse in all Applications?

Question

How do I customize the key combination to cycle through windows in reverse in all applications?  I want to be able to change the global setting for Command+~ (Cmd+Shft+`) to something more desireable.  I could NOT find a way to do this in Systems Preference -> Keyboard -> Keyboard Shortcuts since there is not a menu selection "Cycle Through Windows in Reverse".  I then went and looked in the plists DBs of Finders resources hoping to find a setting I could override.  I was quite supprised, as well as some of the MAC gurus in the office, that there was not an easier way to override cycling through windows in reverse on a MacBook - the most user friendly and accessibility aware computer on the market:)
Here is my MAC software info.
System Version:  Mac OS X 10.6.7 (10J869)
Kernel Version:  Darwin 10.7.0

Answer 1

I don't know of any way to have a separate commandkey combo for the reverse cycle function.
From the Help pages for OS X 10.6.7 ("Using global keyboard shortcuts") -
NOTE: You can create keyboard shortcuts only for exisiting menu commands.
Since the 'reverse' cycle command is not an existing menu item, creating a separate key combo for it doesn't seem possible. Apparently the 'reverse' cycle command is a fixed one, internally defined as a mod of the normal cycle command invoked by adding Shift to its key combo.
There may be a way to achieve what you want via a two-step process: write an AppleScript that will invoke the 'reverse' key-combo set, then link the activation of the AppleScript to a key combo of your choosing. Not sure if this is even possible, though - usually AppleScript activation via keyboard would be set up via an FKey.
I can understand wanting to share the RSI risk evenly between both hands, or even to unload the left hand if that is desirable. However, apparently a two-key combo can't be done for the reverse cycle function. Is a three-key combo not possible? ...meaning a two-key combo on the right (Command plus something) for normal cycling, adding Shift for reversing?
One caution about changing keyboard command combos - it's very easy to accidentally set up a conflict with a another existing commandkey set. FWIW, most, if not all, of the mnemonic and easily-reached letters are already used. In this vein, the Keyboard Shortcuts page of the Keyboard prefs pane shows such conflicts via a yellow caution triangle next to the conflictors.