I have just set up a Marantz SR5200 AV receiver + B&W speakers for small home cinema system and am having problems : 1) Cant seem to get On screen display so that I can set up speakers correctly. 2) What sound should I get from Sky Digi box (I get sound from all speakers using from DVD player) but only front channels (R/L + centre) from Sky Movies. (Scart from Digi box to TV and Audio R/L to Marantz. Am I missing something (maybe a brain!)?? Any ideas please.