i have read about it before. i think europe had them from the beginning of the bike. if you look closely to the left control youll see a spot where youd likly want to have the switch (( kinda like a small-ish blk cover/tab )) ,,well thats where they have it in europe,,i have no idea how/where they did it on the newer bikes.
also,if you can find pictures on line of a 2003 from europe,,you might get lucky and see the switch yourself.
from what i remember,,theres a switch you can get, (( up-grade parts to copy the europe version))and just put it in the controller you have now,,course youll need wires as well. when i read about it,,the guy was gonna do just what your talking about.
im nearly positive i have seen them in pics ...........
sorry i cant remember more. ill look in my "favorites" to see if i saved it for future reference... like NOW is the future i save crap for. heh heh heh
that page from Kriss.... they have some decent stuff
43 19' 41" N
76 29' 53" W