I apologize for this being my first post and don't know if anyone else has told of this, but here goes.
There are two programs that I use for this process and it doesn't take too long.
First, you want to download Wavepad (or any program that lets you edit MP3s):
http://www.download.com/WavePad/3000-2182_4-10769412.html?cdlPid=10831201I posted the FREE version.
Open up wavepad and drag a song or open, however you feel comfortable. It will bring up a black background with lots of green lines for the music.
You want to edit the song to the length you want it of a part you want. I suggest don't go over a minute long, 30 seconds is a good time, but if you're like me, some songs are better with a minute.
When you go to save the file, I just used the default because the next program converts the ring tones for you before it gets added.
EDIT: to move the ringtone to your BB you can use the media manager that came with the DM on the Cd that came with your phone or just copy it to the phone direct through Windows when your BB is plugged in or connected via Bluetooth.
Reason for edit: Bibpim does not work with Blackberies