Was looking through the opengauge source folder and saw the new mpguino diagram (v1.3). It uses the atmega328 chip, but has a few extra connections
A1
A2
RX
TX
PB2
PB3
AR
These were not on the previous diagram so I was trying to figure them out. I did some looking through the forums to find info on this new diagram.
I was able to find this page
hxxp://ecomodder.com/forum/showthread.php/differences-between-prebuilt-mpguino-code-official-code-14751.html
In which a member states there is no arduino dependency.
So I'm assuming that chip can just be programmed outside circuit and put back in, hook up vss-injector-battery-ground and you are good to go? Or is it a bit more complicated?