How do I display 720 or 1080 hd on my "hd" ready projector that has a "component" VGA input? - display component on rgb

He says, "HD ready". I am a very intelligent electronics, but I have mixed access to information. Obviously, the title (high resolution) that work through the VGA (components) in, but how do I get an HDMI or RGB signal to VGA component. Can I place an adapter cable, or are they really "need" a converter? So basically, from component to component RGB VGA. Is it possible? Is it easy? Is it cheap?