Fantastic guide guys - well done ! I bought a new battery on eBay and would have been in a lot of trouble without this guide. For what it's worth -there seem to be a lot of questions about glue. I bought a genuine Apple battery, which came complete with glue strips ready to go. Once I removed the old battery and glue strips, I cleaned it up with isopropyl alcohol and stuck the new battery to the clean surface without a hitch.
I didn't have an iOpener, so I used a wheat type heat bag. If you do this though, make sure you put a layer of plastic between your Mac and the bag, or you'll get condensation in places you don't want it.
At this point it's a good idea to take sheet of printer paper, like A4, and press each screw into the paper roughly in the position it was removed from. When it comes time to reassemble it, you wont get the different lengths mixed up.