When working on my pump (see Yak's post #3 for the link - thanks Yak!) I found the hardest thing to be removing the pulley. Some kipper had painted mine and it got a bit glued on... so hopefully you won't have as much trouble.
Please note that the pump I have has a flay pulley - not the more bell shaped one your pump has. So getting the SIR tools puller is probably the best option. Failing that take the pump to the dealer and ask them to remove it.
There are several panic threads on this forum of people saying that the bloody pump won't pump after a rebuild. To stop this from happening you need to make sure that the little shuttle valve is perfectly clean - actually it is best to make sure that everything is clean!
Here's a good trick for draining the power steering fluid:-
http://www.peachparts.com/shopforum/showpost.php?p=2604834&postcount=5
And the pictures to go with are (in post #6):-