thanks again, slowbiscuit;
I'm in Mexico City and my cable company is called Cablevision; it's all over the country and is the largest; there's lots of small local cable providers in the boondocks.
The only option here is cable, Sky (dish) and DishMexico (dish). the last one is kinda lame, offering only local channels plus movie channels (HBO, Cinemax, etc). The Sky dish option is okay: I had it for a couple of years, but they don't offer any HD programming.
So, if you want HD, the only choice is Cablevision. There's a couple hundred channels, very much like in the U.S. plus they offer highspeed internet. I'm very happy with their service and large range of channels they have, although there's still only about a dozen HD channels.
anyway, they know nothing about cards, although they DO offer a non-HD Tivo box in place of the Motorola 3416.