Can you explain the bolded part? I still don't see how to connect more DSP inputs
Any or all the DSP inputs can be connected to any of the Main-in outputs, or any of the DSP outputs. Can you be more specific – exactly what inputs are you unable to connect to what outputs ? As far as I know, the routing program is correct – anything it says you can't do, you can't do.
Also you wrote that FW in can be connected directly fo FW out, which would really help, but the routing utility doesn't allow that.
Sorry – you are right here – I was wrong. There is some hardware restriction (which I never understand) that stops you from doing this.