Import playlist from usb to PC that has the files on it

Hey Guys,

I've searched over this forum but I cant find the answer for my particular problem :(

So what's the deal? I've got my music on my PC, on my laptop and on my USB.

Only my USB stick has all my 1500+ files sorted in playlists. So i just need the data from which songs are in the playlist and let RB on my pc add them into the right ones.

If i try to import these playlists (rightclick, import, dont copy) I cant use the songs when i unplug my usb even though all the files are on my pc.

I know i can copy the playlists with the files but then i got my whole collection double which isnt really practical. 

Does anyone have a solution? 
Thanks in advance :)