This has gotta be the head of the "God".

I'm referring to the mural, not the one with the space jockey joined up with a creature, but the other one. It's gotta be, you can make out the eyes, the Space Jockeys are worker bees almost/maybe. Working under instructions from the higher beings. They could just be scientists/engineers bound to serve their masters, hence the Prometheus allusion to working under a God/Deity. http://www.google.co.uk/imgres?hl=en&client=firefox-a&hs=3v&sa=X&rls=org.mozilla:en-US:official&biw=1280&bih=661&tbm=isch&prmd=imvns&tbnid=RiF9dAo2gLaw1M:&imgrefurl=http://www.prometheus-movie.com/community/forums/topic/3862&docid=zjSvv2vVkmmZNM&imgurl=http://i.imgur.com/uxAo9.jpg%253F1&w=1680&h=1008&ei=yC6oT4ubNsmr8QObubTfBA&zoom=1&iact=hc&vpx=365&vpy=374&dur=1730&hovh=174&hovw=290&tx=146&ty=111&sig=104289838094676884800&page=1&tbnh=138&tbnw=187&start=0&ndsp=15&ved=1t:429,r:11,s:0,i:96 Sorry, having trouble linking, try that one instead.