For anybody that is having trouble figuring out how to set a certain ringtone to one of your contacts on the Droid 2, I finally figured it out after like 20 mins of fudging with this thing.
1. Go to contacts
2. Tap on contact (ex: Joe)
3. Tap menu button
4. Tap Edit
5. Scroll down to Additional Info and tap the arrow to the right of it.
6. Scroll down to Call Handling and tap Ringtone
7. Choose ringtone
8. Tap Save
Hope that helps any fellow noobs to the Android OS