Actually this is a pretty easy thing to do.
That's it. The next time you plug your phone in it shouldn't do anything.dancedroid
- Look to the bottom-right-hand corner of your screen near your clock and date (I'm assuming you're using a PC, not a Mac).
- Right-click on the Motorola symbol. You may have to click the up arrow if you're using Windows 7.
- Click "When phone connects, launch..."
- Select "Nothing"
Enjoy the peacefulness of knowing you have full control again.