I'm not unicable protocol specialist. I have one cable installation with Inverto IDLU-QUDL42-UNR2L-1PP LNB (
http://www.inverto.tv/products/product.php?id=358) which, according to specification uses DiSEqC command extension based on EN-50494. It means that I have average consumer product.
My tuners are Ferguson Ariva 253 Combo (it uses IF 1210 and works great) and TBS 6902 Twin Tuner PC Card.
So far I have tested DVB Dream, DVB Viewer, DVB Link.
Although DVB Link has unicable configuration, I coudn't make it working.
DVB Dream support only one device per instance and works with unicable.
DVB Viewer supports twin tuner and unicable, however refuses to work with PIP and ACamd or WinCSC.
Unicable configurations in DVB Dream and DVB Viewer are easy. Such kind of simplicity I would like to have in ProgDVB.
DVB Dream
1. Select LNB type

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2. Select slot fequency. My LNB has 4 IF channels. 1210, 1420, 1680, 2040. As 1210 is already assigned Ferguson Arriva, I select 1420 here.

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DVB Viewer:
1. You have to select device then LNB. There is no Unicable configuration in this step. Just Ku-linear/universal
2. Go to option and cllick Unicable button.
3. Provide slot fequency. Again I select 1420.
Above configurations bind tuner to slot frequency. My configuration would be: Ariva 253 -> 1210; TS6902 tuner 1 -> 1420; TS6902 tuner 2 -> 1680.