can I run two sky boxes on 1 lead from the sky dish. I was told if I get this http://www.maplin.co.uk/Module.aspx?ModuleNo=9273&doy=20m9 I can run two boxes, but have to watch different channels on each box. is this right ??? and if not how can I run two boxes with out getting a twin LMB and second lead can it be done?????