I have taken some of my favorite songs, converted them to MP3 then edited it to approximately a 30 second clip. I then transfer it to my phone (used a data cable and also bluetooth) using BitPim software (http://www.bitpim.org/). You can also use BitPim to backup your contacts to your PC or transfer them to your phone.
Does anybody know how to set up music mp3s on a phone, and turn them into ringtones. Is it possible?