i tried to double up the flash on an me7 ecu a while ago. did a nandwich style install, connecting all legs except CE, installed a switch between CE on both psop's and CE pad on board. this did not work.
not sure why it didnt work as ive done nandwich installs on other boards with a switch between CE the same way, maybe someone could clue me in?

anyways, my next idea is to install a larger flash. 400bb in place of 200bb, ect. first half of flash would have stage 1 tune for example, next half would have race tune.
would this be possible and with a phyiscal switch to switch between the different files?

i know way back when chris tapp was doing something like this with a switch on the ecu.

like this:

the sandwich thing should have worked fine.

For AEB you can just use a double size chip, there is no need for crazy stuff. Maybe you should be a bit more specific, as you started your post with ME7 and then somehow slipped to 29F200BB.

Hi,

I use their boards for map switching

http://www.grautec.com/

You can switch maps mid run with no problems.

Cheers,
David