Changing the items I changed was not that big a deal, if your pretty mechanically inclined, now if you have to do the evaporator, that's a pain.

Here is the link to an A/C Forum which a think is excellent. http://www.autoacforum.com/categories.cfm?catid=2

It has easy to follow instructions regarding charging, and pulling a vaccum too. I was helped by this forum last year when I redid my system.