Anyone know where the option is for switching the AEM over to Alpha-N from map is?

 

Nobody? Some days I miss my megasquirt...

 

There's an option called 'speed density' and an option called 'mass air flow' - if these are both OFF, the EMS will use throttle as the y-axis for the fuel and ignition map.

The 3D maps will display 'load' for the y-axis label (not 'TPS') but you can adjust a few options so the Load reading goes from 0-100%. Set 'Load Offset' =0, 'Load Scalar' = 1, and adjust both the 'TPS-to-Load' table and 'Load Breakpoints' table so the first cell is set to zero and the last cell is 100 with a straight line in between.