I recently got a series 3 tivo off craigslist for dirt cheap. Was told it fully works and it appears to boot up fine. I want to possibly $99 lifetime it and just stick it in a guest bedroom that isn't used much. Now, I also have a spare S-cable card i can (temporarily) use in it and was wondering if it is possible to call comcast & just pair the cable card with this series 3 and then view all channels, but not get the lifetime tivo service just yet. This way, make sure it is indeed fully working. Once all is good, then get the lifetime service. I realize I would absolutely no TiVo features (guide and mrv) until I subscribe, but I just want to basically view some channels for now. I also realize there is a 30 day money back with tivo in case there is a problem, but i would rather not have to possibly deal with all that and basically just make sure it is ok on my own. Is this doable in any way?