Vertex Painting

Hey everyone, i need som help learning how to do Vertex Painting, i can paint objects but when i render it it doesnt show up??
Do i have to apply the painting somhow??
n e ways, help would be greatly appreciated.
laters guys
also list some tutorials if u know of any

in the material settings press vcol paint [makes material color vertex color] or vcol light [makes vertex colors add as light, mostly]

hey man u just saved me a heap of time, i owe u 1.