I just came across this on my F-150 forum. Might have to wait to see. States that it can hold tunes for multiple vehicls. Like my stang and SCREW (super-crew F-150).
http://news.hspn.com/articles/780/1/...ice/Page1.html

 

No ..it only works on 1 car . "It can monitor up to 20 parameters..."

 

If you want multiple cars, look for Fuego [8D]

 

Sorry, I just read "The most important new feature is the 128MB SD memory card. LIVEWIRE is capable of storing multiple tunes for as many as 20 different vehicle applications, plus it stores the complete factory uploaded program. " and assumed that it held that many for a reason. Oh well.