Yes, that strip of stiff material is it. Cut it lengthwise into two 6x1" strips, then cut them about 3/4" wide.
You don't insert one hinge, glue it, and then do the next one - You insert all of the hinges, add the control surface and then glue them all in one shot.
I did a detailed "How To" on the PROPER way to install CA Hinges. Give it a look, because installing them improperly can easily lead to a hinge failure!
http://www.rcuniverse.com/magazine/a...?article_id=55