First of all, hello and thanks to all. A friend of mine recently gave me a Samsung DirecTV DVR SIR-S4040R. I know is some what old, but it gets the job done, and I have some questions on how to set it up. 1. I already have DirecTV. Can I use the card I have in my current box, or the one that I got the Samsung box? 2. Do I need to get the Second antenna hooked up? What are the benefits for this? Thanks for your time.