Hi,
Thanks again, I see what you mean now. I guess I was hoping to be lazy and only run one cable in the installation. If I can't find out about the projectors then I'll have to run composite, S-video and VGA cables up to the projector and use an infra red extender like you say. It would still be handy to know if projectors will generally take the output from an upscaler as any external switching is always far smoother and professional than the changing of input sources (well I think so anyway).