It's actually quite simple. What you need is a small punch, just smaller than the diameter of the pin (i believe 3/32 is the size) and longer than the grip is wide. I found a 3 pack at a big blue home improvement store, one of the pins will also punch out the extractor pin.
What you will also need is a block of wood with a hole drilled in it. Not all the way through, and just larger than the frame pin. I have a piece of 1x2 that I covered in leather with contact cement and staples. It makes a great small 'anvil' that won't mar guns.
With the gun left side up, (the safety/release/etc.) facing you, hammer the two pins out one at a time. It actually takes a few good whacks. When this is done, you can kind of pull the front end of the frame up and forward a little bit, just to get the back of the frame clear of the grip. Just work it up and down gently and slowly until the trigger swings up (the frame kind of pivots under the back of the grip) and the frame pulls free.
Now, watch out! The safety is held in only by friction, and if it pulls up the little ball bearing will disappear forever! I luckily found mine... The slide stop also just kind of 'sits there' for you to lift up and the spring will pop free. It takes a little twisty-motion to get the spring back in, but installation is otherwise 'reverse of removal' (my FAVORITE Hayne's manual quote).
I have done it, and have pictures but would like to post them in a separate thread.