Thanks k1983. my advice is to think about structure first, and use egg crate inside your larger forms. This way, the cork doesn't have to work as hard, and is a lot easier to glue into place. also, cover as much of the background as possible. I wish I hadn't left exposed glass on mine, it would be much nicer if the whole back area was cork.
also, keep in mind that you will NEED to rinse it thoroughly after it's all dry. By thorougly, I mean you need to spray it down with water several times, empty the tank, and then run warm (90º) water in the tank for a week with daily 100% waterchanges, before planting or anything else. Do this without substrate. It is really a required part of the process in my opinion.
good luck!