All three pins in the Glock should be pushed out left to right, looking from the rear, and replaced in the reverse order.
Couple of things to note; There is a plastic firing pin sleeve that often need encouragement to come out. One of Badger's pictures showed that part removed but around the firing pin.
Another thing is that there are two tiny plastic firing pin spring cups. They are at the business end of the firing pin. They can be a bear to get reinstalled. The firing pin spring must be compressed and the two half put into place and the spring released over them. I have drilled a small hole in a work surface so that I can place the rear extension of the firing pin in the hole when I compress the spring. It supports the firing pin and keeps it from scooting around during the operation.
Next is when reinstalling the Slide Stop Lever. It has a straight wire spring that needs to be positioned properly on one of the pins. It can easily be installed on the wrong side of the pin and not provide the proper tension.
Last thing, as you will probably know, it will help to use a drift or punch to align the holes in the parts and frame, putting the drift in from left to right and then inserting the pin from right to left and letting it follow the drift out, keeping the parts aligned.
The home page of Lone Wolf Distributors has an expanded parts diagram if you want to check it out
http://www.lonewolfdist.com/It is not a tough job at all.
Have fun