his tut will show you how to make a photo look cartoonish in three easy steps...
1)Open your image in photoshop, doesnt really mater what size or shape anything really a landscape, city, or a person. I am using a pic of DJ CLue in this example[/b]

2)Go up to Filter>Blur>Gaussian Blur and set the radius at 3.0 or higher depending on the effect your looking for.

3)Last go Edit>Fade Gaussian Blur. A window will pop up... set the mode to darken for tha cartoonish effect or to any other mode for plenty of other effects. Lower the opacity if you don'tl like what it did to your image. You should end up with this if you set the mode to darken.

Enjoy....