i phone 4s, i tunes, mac book pro
my original i tunes account is housed on an old Dell. i have populated my i phone with all the music i care about. my question is, how can i populate my new Mac Book Pro's i tunes with all of the music from my i phone? when synching, i get the impression the i tunes account on the Mac, which has almost no music on it, acts as the "master" library, and will erase the music from my phone.