Draining a fuel tank

I need to drain the fuel from a 79 mustang and was wandering if there is anything special I needed to do? Does the whole tank have to be removed?
[addsig]

Well, it depends what you want to do to the tank. If you just want to get some old gas out, you can buy a pump that you can use with a hand drill....and some garden hose. I don't recommend the old fashon way of sucking on a hose & using gravity, but it works and is real cheap.