Single-switch, 3 country mod for genesis/md.

I dunno if anyone has put it up anywhere or not, but I've done a single-switch mod for my Nomad (which yes I know I said in another post) that could easilly be done on any other Genesis or MD model... I dunno if anyone is interested, but if someone wants it, I can draw up a clean diagram and post it for you. Let me know =^.^=
Ill put the diagram up soon, ive been really preoccupied with school and work and everything...

Soldermonkey: to my knowledge, the sega cd uses specific ROM's to designate country.. I don't know if it's as simple as rigging jumpers.. but then again, i havent researched it much as of yet