Help with creating gategory strips.

[cartooner]

I would like to design my own category strips. So far all I have learned to do is make a simple rectangle image and use it in the category color box in the style template I want to design(the skin I want to use).

I want to make some nice rounded corner Category strips, and I see that to do that you create a left side, middle, and right side. How do you put these toether then in the style template. For example the way I do it now is take the category image, upload it and in the Category Strip background box I type in url(images/misc/cat.gif)

I really would like to learn how to put 3 images together for the category strips...

my site is at www.edtoonsboard.com
Thank You