Hi Guys. Its been a long time since Ive been here...I moved to the country about 4 years ago, and got a DirecTV HD Tivo. I am now moving back to the city and Time Warner is my cable provider. They want to charge $15 per month for their HD DVR. I saw series 4 "lifetime" TiVo HD DVRs that claim they are cable compatible. I have read many stickys and used the search function, but Im still not clear on how this works, and what actual equipment do I need. I just confused. Can someone explain what I need to get to have a functioning HD DVR on cable? Thanks!