Loramin, or someone else more familiar with Macs than I am would be the guy to ask about that. Best I can do is point you to this post:
https://www.project1999.com/forums/s....php?p=1265123
Step 15 is the part I was referring to. If you were dragging the files themselves I would imagine it would work - it's just when copying the directories that they wipe out previous contents.
-Mcoy