Hey Gary, Is this the one you are talking about?:
http://www.stevedgood.com/seaman.pdf. It looks fairly easy. I would stack cut 3 or 4 layers of 1/8" Baltic birch plywood or 1/8" Oak plywood. You can also use two layers of 1/4" plywood. Use blue painters tape on the edges to make up the stack. Doing this will give you multiple portraits in case one is damaged, and as soon as someone sees it, they are going to want one too! But most importantly, You have better control of the workpiece.
This would be a good time to try spiral blades if you haven't tried them yet.
Sand the layers to finish grit before you make up the stack. I sand to 320 grit. Then when done cutting you only have to touch up the fuzzies with the final grit.
Have fun and ask for help if you need it!