yes you can check this out
http://www.mk5golfgti.co.uk/forum/index.php/topic,52806.0.html
i read your link twice but i got lost on the technical part,,, looks way beyond my skill set.
I have a 2008 model, am i right in thinking i cant just code it through vcds ?
excuse my noobish skill set
OK to sum it up.
you obviously need folding mirrors to begin with
you replace the module in your drivers door with a specific one from a SEAT
if your car is 5 door the rear lock module also probably needs changing
if your car is 3 door the limits of up down on the glass wont work correctly hence you add the bit of metal inside the door
once coded to your car all will work as follows
get out of car press and hold lock button until the mirrors fold (it sends signal to passenger side) and or the windows are up (you can code this for 1 touch)
once back in the car turn on ignition wait 1-2 seconds for mirrors to unfold (vital if you want it to work every time) then start car.
the mirror switch can over ride this function at anytime