Pharmgirl, I went back and reread your posts about this and I see your Dad has congestive heart failure, which I'm guessing is why they are recommending radaition alone without the chemo. But it might be worth getting a second opinion about that since chemo boosts the effectiveness of the radiation by quite a bit, if he can tolerate it.
By the way, my Dad was daignosed with congestive heart failure (would have need a quadruple bypas after a silent heart attack but had too many other risk factors to find any doctor who would do it)and yet he has stabilized, thanks to all the new meds for this out there, and has lived a pretty good life for the last five years since he was diagnosed, so that is by no means an immediate death sentence in itself these days. Your dad could have radiation, recover from it, and have several more good years even with that diagnosis.
Nelie