You might want to read-up a bit on how ADBTuner works -- but the short version is that you connect a streaming stick to an HDMI encoder, and then ADBTuner allows you to create virtual channels in CDVR using the captured stream.
This particular Project One-Click Action is designed to add all the DTV channels, to which you're subscribed, to ADBTuner. When ADBTuner is configured with one or more streaming sticks connected to one or more encoder ports, each becomes a virtual tuner you can use in CDVR.