What I said, is that I did use it in the past, that I can't think of any reason why it wouldn't be possible any more and that I can't test it atm as I have no Unicable LNB in my motor.
Anyway: the settings allow you to do it, as can be seen in these screenies:
Unicable 01.jpg Unicable 02.jpg
But be aware: this is a dummy setup; someone who has an Unicable LNB should try if the loopthrough will actually work.
And I really don't understand the confusion: the setup is basically the same as any Unicable setup for a fixed dish, but I thought that came from the FBCspecific setup.