I have an owned but deactivated HR22 sitting in storage. My friend in California is thinking of buying it to add to his setup. He has 1 HD DVR, 1 HD receiver, and 2 SD receivers. His MRV setup is a DECA setup. My MRV setup is not DECA; mine are all connected via ethernet. Therefore, I'm not familiar with how he'd go about connecting my HR22 to his setup if I sold him it. I guess a couple questions are: If he adds the HR22 to his setup, how would he connect it to his DECA setup? On which of his current four receivers would he be able to view recordings made on the HR22? Would he be able to view recordings from his current, sole HD DVR on the HR22 I sell him?