How to use Miele Ultra Dark and Fabric Conditioner with Twin Dos

I'm wanting to use Mieles UltraDark in place of Ultra phase 1 and Fabric Conditioner in place of Ultra Phase 2. Number one is this possible and number two, is there any way to use the UltraDark in Phase 1 compartment and Fabric Conditioner in Phase 2 compartment at the same time? By setting the 2 compartment to Fabric Conditioner in the settings, does it know to use it every wash? If any one knows or know what I'm on about can I get some advice? Cheers and TIA (and yes I bought the Miele spare empty plastic bottles for this experiment)