Oh ok proper, you are no snowleopard.
Uhmm, just sec.
Ok, what you can do is download candybar, and switch your dock to the 2D option. Then, replace the dock backgrounds with transparent dock or create a single pixel picture and it should make the dock invisible.
edit: Or if you download mirage, find the files yourself by deconstructing the file and dragging them into Candybar dock manually.