You will need to get an A/B switch and maybe a cable or two.

Here goes:

Cable from outside to DTV tuner in.

DTV tuner out to VCR in.

VCR out to A input on A/B switch.

DVD out to RF adapter in.

RF adapter out to B input on A/B switch.

A/B switch out to TV in.

Choose A on A/B switch to watch DTV or VCR.

Choose B on A/B switch to watch DVD.

I'm just now getting back on here. Thank you for the quick reply. I was so excited yesterday evening, as I'd somehow managed getting everything hooked up and working, was almost jumping up and down with joy and disbelief! It only took 2 MORE cables and a little splitter thing from Dollar Tree! However, I'm going to print out your directions right now and go fiddle with it some more, as I do believe your method will eliminate some of the cables.

I am still trying to figure out something, though: the VCR... how can I get it so that it will record a program off TV, if desired? I thought perhaps, if such a thing exists... a cable with a male on one end and two males on the other, so that the pigtail one could be connected to both the VCR in and out? I called RAdio Shack, but was told they don't have those, so this morning I added two MORE cables and another of those little doo-dads, and it 'worked', but needs major tweaking, as there's too much interference.

Thank you so much!:)

Oh, THANK YOU, THANK YOU!!!
You are so awesome!
I followed your directions to the letter, and, not only have you eliminated all the extra cables and doo-dads, but, THE VCR RECORDS--AND--we've inherited 3 more channels!! Yippee!!
Oh, I feel so 21st century, ha!!
Free TV!!:)

Enjoy!