Like a lot of things, its easy if you do it a lot. I don't.

As mentioned, it is driven by the timing belt and you would usually service them together. If you haven't changed a Neon timing belt often or ever, allow plenty of time. To help gain access to the pump, it helps to unbolt the engine mount on that side and raise or lower the engine a little as needed with floor jack and wood block under the pan. I found getting the crank pulley off takes a good 3 jaw puller... its tight.