Update: This is obsolete in Falcons with a steering wheel as you can use the multi tune to select tunes/boost etc. This guide is only applicable for conversion cars without a factory steering wheel. To achieve dual maps in the flex fuel custom operating system you can wire a switch into the second o2 sensor input (pin A37). This will require a custom operating system with "dual maps" enabled and "user configured voltage selection". A great pinout is available here. 5v can be sourced fr