Setup a custom ringtone for a specific contact on your HTC Droid Incredible.
1. Open the Music app.
2. Tap at the bottom-left corner of the screen to go to the Library.
3. Select the song that you want to use as ringtone.
4. From the Playback screen, press Menu.
5. Choose Set as ringtone.
6. Tap Contact ringtone.
7. Select the contact you wish to link to the tone.