I have iTunes on different PC's located 700 miles apart. One is the primary PC, the other the remote. I just bought an album and downloaded it to the remote PC and want to transfer it to the iPad. When I try I get a message saying that the IPad library will be erased if I complete the transfer since the primary PC is already the library of record. I have a movie rental on the iPad that will be erased if I proceed. Any suggestions on how to transfer the album without deleting the rental.