My wife and I, with the kids, used to go to my Grandparents house and I'd set my Camcorder on a table off to the side with it recording. We'd just talk and interact like normal with them and I had quite a bit of recordings of them. Years after they had passed, I grouped the recordings of them and put them on a tape and then on CD/DVD's and made copies for my siblings, kids and cousins. They can see and hear the Grandparents as they actually were! And so can any of the future generations.
I watch "Finding Your Roots" PBS series and while IO'm not a real fan of Van Jones, he made a statement when he was on the show that something like: "You don't die until after the last person says your name"! I've done a lot of ancestry research so a lot of my ancient and recent relatives still live! If I can get it all organized as I intend and distibute electronic copies to all the other relatives, a lot will live a great while longer.
Bob, it's neat that you have those pictures to re-enforce your memory of your wonderful wife and partner in life. As long as Nita lives in your memory, she lives! Memories of happy times are good for your soul IMO!
Take care,
OLE442