The Nokia N8 isn’t even available yet, we’ve already seen the disassembly photos, why not get accustomed to HOW to disassemble and assembly one :p?
It’s probably best NEVER to disassemble your own Nokia as it will void your warranty. Worse, you could break something.
Having said that, the Nokia N8’s battery requires some minor disassembly to change it (you’ll only need to do things a few years into N8’s life if/when battery wears out. It’s your standard BL-4D). Avert your eyes if you do not wish to see the N8 dissected.
Update: Download original file here