ReplicatorG and support material

Is there a way to use one extruder for support and the other for model. I have 3 full Stratasys breakable support cartridges left over from a printer I sold and it is really good to remove as it is very brittle. I would like to use it with my Wanhao but cannot find a setting anywhere to make the printer use one extruder for support and the other for model.

It has to be there somewhere.

I think you just have to manually set the temps different for each one.

Temperatures of the breakaway are the same as the ABS, it is how to make it use the other extruder that I can't figure out. It is not easy manually either as there is no separation in the Gcode for support and model, the layer does not change.