I'm sure you'll find plenty of tutorials in the "tutorials" section. But I'm in class right now, and finished my work, so I though I'd help you out.
Truthfully I've never really made a verctor image before, but I know what they are. I'm sure you know what they are too. Here's a really good
detailed tutorial on how to make a nice vector.
http://www.heathrowe.com/tuts/vector.aspBut if you want to make one the fast way, just do this:
Open the image that you want to make into a vector.
Click Filter > Artistic > Cutout. Then add the following settings: Levels 8; Edge Simplicity 5; Edge Fidelity 2.
That doesn't make near the vector that the first tutorial does.
Hope that helps.