I have an old Sony CRT projector and I quite enjoy it, but I'm looking into trying to get a DVR that has PIP so that I can watch multiple shows at the same time. My question is would buying a used Scientific Atlanta DVR box work. It has PIP capability but I'm not sure if the unit will still function as a tuner without a signal from the cable company. If that won't do what I want, would someone mind suggesting a unit that would give me PIP capabilities? Maybe a DVR, buts thats not nearly as important as PIP.