Of the aircraft I've had the opportunity to work, the MD80 is the only one with this feature. Not on the 737,757,767,777.
If the MD80 loses L & R AC Power inflight, the starter is disabled. The Ram Air Doors open fully and allow the APU to windmill start.
The 737 starter is available as long as the battery has power. The 757, and B767 starters are available as long as both batteries have power. The B777 is similar to the 757/767, but it has an additional pneumatic starter for the APU.
As for the start procedure, you just start the APU door normally. The RAM doors switch is supposed to be in normal for the start, and it will go to the RAM position for the start. And with aircraft going as fast as it is, the ram air gets the APU moving, as I understand it fairly quickly.