There is another style of shading that I like to call Staggering shading, because you stagger different colors to create a sort of textured fabric effect - at least that is how I use it :) Anyways, as you can see I am using one of my dolls as an example, it is this one, and I will show how I created her skirt:

With whatever peice of clothing you are working on, first create a palette of color that you wish to work with. For me, I usually end up working with 4 or more colors. Here is the palette of colors that I choose:

So, now I take just the outline of the skirt, and make it the same color as the darkest color in the palette I choose.

Next, I start to outline the skirt like I would as if it were being shaded normally, with the third darkest color from my palette. But, now here is where I start to stagger the coloring. Bring the third coloring out into the skirt a few pixels at every few points. You can also see I brought the coloring in between her legs, to make it look like a very tight skirt, and staggered the coloring along that point as well.

Now I take the second lightest color and work inward, staggering more than the other colors. I make sure to leave room for the highlight color.

And then I use the last color as the highlighting color, and fill in the spaces where no other color was. And there, I have my finished skirt!

And again, here is what the finished product would look like:

I would love to see examples of anyone's dolls if they use this technique! Let me know what you think of this tutorial, and remember, this doesn't just apply to paint shop pro, it applies to any painting program that you can use. And also remember, you can use this same tecnique on shirts, shoes, dresses, or any other peice of clothing!