I have just added a new tutorial tomy website's tutorials section.
This tutorial, called "Monkey VS Robot", shows how I created a trading card illustration using Photoshop and Painter. To see it go here: http://www.robertocampus.com
This tutorial is also featured in the book "Digital Fantasy Painting Workshop (http://www.amazon.com/exec/obidos/ASIN/0060724323/cyndilauperon-20/104-0201529-3876709)" by Ilex Press.
P.S. Check out the rest of the website too.. I have added tons of new stuff.