Is there anyway to get the map that MyTomTom 3 has downloaded onto my computer into a state where it can be used?

Looking in the Cache folder which is where it downloads it to there are some files one which is 3gb (the map is pressume) and a cache status xml document that has a link in it to download a file called Europe_TRUCK.ttpkg

I want to update an older device and wondered if there was any way to do anything with what I already have rather then re-downloading from the links on here?