Just found out and installed the bettertouchtool...
works very well, and you can disable and enable virtually anything you can think of...
Free too... won't be long until this functionality is provided in an Apple software update, but in the interim... an amazing find, and the guy who developed it seems pretty keen to work out any kinks you might find.
Anyway, kudos to *LTD* who gave me the suggestion.
Enjoy!
TMS