There are TONS of write-ups on this, just do a search. Make sure you get a factory thermostat (or put a small hole in an aftermarket one near the top) so that the air can bleed off. I replaced my bottle last week and it was a cinch. Just be sure to get all the air out, and check the fluid levels over the next several days and add where needed.
Basic proceedure is to drain via the temp sender (driver's side of the block) or the drain plug on the radiator. The drain plug is a PITA, so the temp sender may be easier. Replace the hoses, bottle, t-stat etc, then refill via the bottle. Once you have as much fluid in as it will take, there are several bleed proceedures. The one that worked for me was to put the cap on the bottle LOOSELY, then start the car. As soon as the coolant was bubly and about to boil over, shut down the engine FAST. Wait a few minutes and the engine will start to suck fluid down. While it's doing that, pour in more coolant/water/mix until it stops sucking. Do this a couple of times until it stops taking more coolant and you're done.
I had to go one round of this, but other folks have had to to several. I also had to add fluid a bit for the next two days or so. Be sure to use distilled water.
Good luck!
Andy