I hung mine with a few bolts through a tube, then hung it from hooks into the ceiling joist.

I stripped the old paint and repainted mine, replaced the old gasket around the doors, and switched my wiring to DC, the local electrical store had bulbs that ran on DC current.

I plugged an old tyco train transformer to the light that comes on when you use the garage door opener; then used two of these home security beam sensors mounted in the ceiling with some relays to trigger the lights as I pull in to the garage.

So the garage opens and the light is green to pull in; trigger the first sensor and it changes to yellow; trigger the second sensor when you are in enough to close the door and the light changes to red.
Now I know I could have hung a tennis ball by a string to achieve the same thing, but where's the fun in that?