I often use Paint for this, it's very basic but easy. Set the paint brush to white, then trace around the head, then fill in the rest of the area. Then set your background next to the image, or on another Paint window, and copy & paste the head onto the background, make sure the button that makes white go clear is selected, and you have your ID pic. I then use the blur & other filters on other programmes to blend it in a little better and adjust the tone etc.
Sorry I'm not too good at explaining stuff, it's easier to do than describe. There are some programmes which will do all this with less steps and more bells & whistles, but i'm usually happy with the results.
For the Smith card I think I cropped the chart from the Gannon card, as it was clear, but I'm not sure now.
Here's the cards, as I said i'm afraid I can't post these at a resolution that can be printed. I might be able to do you a couple of the blue & white Dragnet cards as I did these from scratch (apart from the photos & sigs), but I need to refurbish the templates a bit first.