Wow it has been a long time since I posted. I must have been busy. I have since been converted to the world of cloth diaper and addicted too. I have a couple of them with velcro and have been wanting to change them to snaps. I finally gave it a try, pretty easy. Here are some before and after photos.
All you need are the following: a pen, an awl (I used a seam ripper), and a kam plier.
You can find the instructions here, http://www.kamsnaps.com/Adding-Snaps-to-Thirsties-Duo-Diapers-45.html.