its so simple. hahah
use the pen tool to draw a line around where you want to color(you have to do each color/shade/setion individually), after you outline the area, it'll be one solid color. then open to color swatch thingy, and use the area under your pen outline(automatically saved as a 'shape' layer) for a sample color, and voila, you have a section. then repeat x1000000000000000000 and youve got a vectored picture hahah.