Sorry for the delay in my response Mike. I used the hack found here:
http://www.whiteson.org/boxster/mods/obc/
It is a switch hack. I followed the instructions to a "T". I have use of everything except the speed gong....which I personally would never care to use. From memory, I have the outside temp, average speed, miles till empty, trip odometer. The gong does appear, but I can't modify it. I can reset most everything else by depressing the switch for a moment or two.
My error was that I originally used a heated seat switch, which is apparently more complex than the footwell lighting rocker switch.
I spent about $50 in total on the hack. I'm still considering a 4 stalk install because I don't have cruise control on my car ('03 'S'). I'm trying to learn if I install the stalk, and have cruise control turned on in my OBC, if I will have use of that feature.