You could, but I would rather not (just my opinion) use any power line protocol (X-10, Insteon, UPB) to control my garage door.Call me crazy but it seems using UPB would be easy to automate the garage door. OF course if the remote is necessary then some RF bridge would be needed. Otherwise a switch could operate it. Also you could by using a contact closer with an input output device operate lighting inside when the door is activated only at night and only when activated from the car remote.
What do you think?