Moose,
Our Squadron moved our website to a new server, so the pics aren't showing up. I think the first one was the one that looked like line art, correct? If so, I use Adobe Photoshop and convert the picture to a grayscale image. Then I convert it to an RGB image and adjust the colors to sort of sepia tone it.
After that I use a filter, I think it is grain, then I use the the Speckle type. I adjust the intensity and contrast down ( I am at work, so I don't have the values handy, but I think place intensity around 4 and contrast around 25 or 30, but you can play with the numbers and preview the effect to get what you want).
That's all there is to it.