I have a Series 3 HD TiVo (TCD648250) with lifetime. Its giving me some reboot issues and I think its the hard drive (see other post). I haven't had time to fully replace the hard drive (with a new image). Until then, I am using a TiVo Premiere I recently purchased & had a question concerning the cable cards for this S3 unit. I know this S3 takes two cable cards and its also possible to have just one in it that will essentially make it a single tuner DVR. However, can it maybe also have unscrambled (HD & analog) channels on the other tuner? Kind of making it a 1.5 tuner DVR in a sense. Or is this not possible & the two types of tuners can't be mixed and matched.