Quick update, I've added Scanline[] and Pixel[x,y] accessors to the class. Not sure if this will be any use to anyone, but just in case they were easy enough to add.

pas file has been updated, but since this is a new page, here is the DL link:
http://www.eonclash.com/gl/uPNGSupport.pas

Also, will be starting a new post about a TGA loader that follows the same model as this one in case anyone is interested.

- Jeremy