I'm not sure what model receivers they have, but they aren't the H20 or HR20 (I have one of each of those at my house) since those are
HD models and they do not subcribe to
HD service or have HDTVs. My mom's TV has been around since I was in grade school (I'm in my 30's now) and my grandpa says his TV is only a couple of years old, but it's a 19" model. Both tv's have a single coax input, that's it.
I had it hooked up as 1inxs describes, but the directv was snowy, like the converter box was interfering with the directv signal. The A/B switch works for my mom. I haven't made it back to my grandpa's with one, but I hopefully will be soon.
Sounds like you guys are going to be heading out for dinner. Have fun.