you need bluetooth software for your computer and you need to convert the songs to .mp3 format to send it to your phone. you also need to edit the songs so they are shorter otherwise 3 songs will probably fill up all your memory. so get WaveEditor or something to cut the songs down. to work it just find the bluetooth menu on your phone and click "search for devices" after your software is set up on your computer. if it doesnt find anything, play around with it and turn it on and off from the computer and your phone, eventually it will work. if your boys got ringtones and bluetooth on they phone then just connect your phone with theirs and under the song menu select "copy to device" and search for your phone and send. its real easy shit once you get the hang of it. if you can work a computer you can do it.
so basically you need a music file converter, bluetooth software, and a song editing prgram. if your computer loads songs as mp3's then you dont need the music file converter, but some comp's load songs in .wma
PM me if you need details