I know of no automatic tool to do automatic photo retouching. I will share that a paint or photo edit program could make this a little easier. Too bad you didn't mention which one...
For one that I have, I use a clone-draw tool. This tool copies a nearby pattern (selectable in offset and size) to the place I am drawing. The effect is what I'm painting over is using same colors as what's in the photo. This seems to help it all blend in.
Best of luck,
can anyone tell me how to edit the date out of my photos once I get them on to my hard drive and into an edit program??? PLEASE HELP ...I am really stuck! thanks so much, D