Pretty much. The entire internet comes up with selling your car and buying a manual if you really want it. I'm still digging as to try to come up with a list of items that are actual requirements. The LIN bus for MY05 (s40 my2005 electrical.PDF) shows that the GSM (Gear selector module) is the only thing listed for transmission control. If that is indeed the only difference between manual and auto as far as network and modules go, it might not be that complicated...I'm simutaneously encouraged and discouraged... that's a lot more complicated than I thought it would be.