tv/sky/vcr connections?

I have just purchased a new JVC 37 inch LCD TV . I have a Sky box (2 scarts) and a vcr (2 scarts). I have just purchased new IXOS scarts and aerial leads to minimise quality problems. There seems to be different views on connecting and i am confused re setting things to RGB and someone suggests switching off my VCR UHF Modulator can anyone simplify this and advise basically how to do it.