Anybody have any input on the belt question?

I am getting a little tripped up on the serpentine belt. Can anyone inform me about the difference between the dealer and factory installed A/C? I see two different belt routings for the 3.8. One has the A/C compressor mounted on the top left of the engine with P/S pump on the lower left and everything driven from one belt. The other has the A/C compressor mounted down on the lower left of the engine with the P/S pump on the upper left and the A/C is driven off of the P/S pump with its own separate belt. Are these the difference between factory and dealer installed A/C? The car is a Squire and it is pretty loaded so I would be surprised if it didn't come with factory A/C, but I don't know how these things were built. The engine in this has the A/C compressor driven by a separate belt from the P/S pump.