James - I think you're right in that the motor blocks look like they are internally connected for analogue operation only, but quite honestly I'm very surprised by this - I would have expected Rene to have made it simple to DCC-chip his kit, and all that would have required is to make the motor blocks 4-wire (2 motor leads, 2 track power) - for analogue operation you'd just connect the paired wires, for DCC you'd wire them to the decoder - as a certain Meerkat would say, "Simples!".
If he hasn't provided this facility - which, as I said, would be a rather odd decision on his part - then you'd have to dismantle the blocks and internally rewire them to allow chipping, if you ever wanted to go DCC.
Jon.