Yes, you can store them anywhere would like. Once applied the deltas get saved in the .pz3 file. To keep everything straight, you might want create a new folder under Runtime called 'morphs'. In that new folder create other folders using the name of who made the morph and stick the MTs there. You can break this down even further for saving MTs for different figures. It'll save you lots of time when you need to use them on other figures.