Particle effects for tires?

I've been trying for a few days to find a script to put in the tires of a ATV I made to make it emit dirt particle effects when it's driven. I can't find any scripts in any of the car script pack's I have and can't find anyone in-world that's willing to help me out. I've seen them in other vehicles so I know it's possible. Just don't know what the particular script is called and where to start searching for it.

Any help appreciated. Feel free to IM me in-world if you feel you can help. Anyone that can will get the vehicle for free. Just want to make it to the best I know it can be before I start to market it.

I can't give you the parameters of a dirt spray, but it'd be just like any other particle script, and may be located in a separate prim to adjust the direction.