Here you go, my ghetto side case fan arrangement. My GPU temps were rather high, so I tried this with a spare fan I had from an old Antec Sonata. Worked quite well, GPU temps went down about 5C. (And I know my wiring is ugly, the case isn't very good for it)
Side of the case. The fan is held on by duct tape; I tried to use screws but my fan had those stupid plastics standoff things, and I didn't want to remove them, so I resorted to duct tape.
Close up of the fan. It was actually spinning, but my camera shutter speed was fast enough that it doesn't look blurry.