If you want to make an interesting image stencil, I`d advise you to use RonyaSoft Poster Printer (http://www.ronyasoft.com/products/proposter/). It is a good stencil making software. It allows you to create rather big and even giant image or photo stencils very fast due to its convenient and easy-to-use interface. If you are interested, watch this video, it will show you everything minutely.
RonyaSoft Poster Printer is very easy to use. All you should do is select an image, and the poster creator enlarges it automatically, slices and dices it into a proper number of pages and prints them. To create a large format poster, you will also need some glue (or tape), scissors and a bit of skill.
