I've got two 301 receivers that I never use at the same time. Is it possible to deactivate one of them (to save the $5/month additional receiver fee) and just move the smartcard back and forth between the unit I want to use? Or would I have to physically move the active receiver between the two rooms? I'll probably do it if I can just move the card between the two receivers, but it's too much hassle to disconnect the entire receiver and move it. Thanks.