Ok, I attempted to get the second STB working this weekend, and I would say I was moderately successful. I follow the instructions above and everything was fairly straight forward, however, I did have to setup my recordings again, in addition to my channels. I am not sure if that was something I did wrong or a result of having to clear my channels and rescan.
I have two Hauppauge Colossus tuners in my machine using the HDMI in from the HDMI out of two DirecTV STBs.
The only issue I am having is that I can't seem to get the second Colossus to work reliably. Sometimes, it will show the channel sometimes it won't. I I have the component video out of each DTV box sent to a tv, so I can see that it is changing channel, but I am not seeing the picture through MC.
After a fresh reboot, I can watch tv from the first or second Colossus (I have some channels that I have not grouped to test this). If I am using the first Colossus to record a show and attempt to watch a show with the second, I get no picture or sound. The second Colossus is showing idle in the show status window. I can see that the box does change channel to the correct channel on the direct wired tv, but the picture and sound never make it to MC. If I cancel the recording on the first Colossus and attempt to watch tv on the second, still no picture or sound, until I reboot.
I can send a log if that would help.
Thanks,
Alex