I’m sorry for the slow reply, Chris, I missed your last questions.
1. I am afraid that neither method allows you to control the tuner from any CasaTunes UI or the Keypads, other than volume level. CasaTunes does have built in controls for certain external tuners, such as the Onkyo, but not for motherboard based tuners.
2. If you use this method, you would have to set it up as a “CasaTunes Player” source and set the CasaTunes Audio Device as the Windows default audio player in order for your tuner software to find it and play through it. Then, CasaTunes can change the volume and turn the zone on and off.
To be honest, the best idea is to either use the built in internet radio service: TuneIn Radio (formerly known as RadioTime) and SHOUTcast or to use a supported external tuner. TuneIn Radio, in particular, gives you a large selection of local stations to listen to.
That said, the methods I described at least gives you the ability to listen to your tuner through CasaTunes.
Kim