its normaly done in IDS.. but because ford got wind of dealers doing it.. and ford left it disabled for a reason they removed the feature enable bit from IDS.. so as dealers upgrade their software less are able to do it now.. not that most will do it anyway.
But the reason its disabled is because there was some issue with it unlocking in the event of an accident.
lots of hidden stuff probably.. like you know the deflation detection system on the facelift 2008 focus?.. if you have a level 2 cluster, which basically all focus have except for the SAT Nav, and Auto which have level 3, and Studio that has level 1.
then you can enable the deflation detection system.. something ford was charging money for as an optional extra.. but all it requires is a few clicks and configuration.