Re: Droid 2 ring tones
Throw the file anywhere on your SD card. From there click Settings>Sound>Phone Ringtone>Select music.
If you click Android System, that will let you select any of the ringtones built into the OS.
I use a Droid X, same thing as the D2, but bigger screen instead of sliding QWERTY. Guts and OS are almost identical.
There's also an app, RingDroid, that will allow you to make ringtones from any music file on the phone.