For example the trackpack 2008 by SGD:
You have in TSM a profile that is called 2008, there you have in the 17 slots, top window 17 tracks. If you want to change first track for example, you stand on Melbourne, right mouse click, clear slot.
The lower window there you have a list of all the tracks you have installed manual or with trackpacks. You look what track you want to put on slot 1 in that list, you go back to the top window and you stand on the empty slot 1. Then you select in the tracklist the track you want on slot 1 by double clicking on the track in the list and it will appear on slot 1. Now you have your own choice of track in slot 1 were melbourne used to be