http://www.ecmtuning.com/demos/capturedvalues.html
look around the 4 minute mark.
he doesnt talk about punching in the values for the switch over point and i dont have my laptop with ecmlink installed to do a quick write up. but this is the page you need to punch all the info into.
you go into the ecu inputs. find the pint your wideband signal is coming in on. and you set up the voltage limits according to the paperwork that came with the wideband and the switch over point.