How do you file songs.....for example my fiancee and I would like to categorize our songs in a separate file so each one of us has our own file....How do we do this?

I would recomend you use iTunes. With that you can make a "playlist" for each of you, and at the same time put songs you both like ... I hope you have a few shared favourites in both playlists, ...which you can arrange in all sorts of ways. iTunes comes as standerd with Mac. I believe you can google it and get it free for Windo$e

Let us know if you need more help