I believe there is a block drain plug some where, I'm not sure where though. Otherwise, take it to a dealor, they charge about $45 to do it and you don't have to get your hands dirty or worry about where to put the antifreeze.

If you are hell bent about doing it yourself, you will need to disconnect a lot of the hoses. You may also want to try running compressed air through after you flush the system. That should take out a lot of the water.