What set-up options are best for DMREX75



Just another quick one, i have set-up my tv, sky box, and my DMREX75 following the instructions,my picture looks a little bit inferior since i hooked it all up, what are the best options for each section in set-up?, my tv is a sony triniton,it has two scart plugs, one marked F the other G, it says to use F for RGB and G for external equipment, my sky box is quite old,it also has two scarts, one says tv, the other says vcr, i put scart into the tv slot, i bought two fully pinned scart leads metal ends and gold plated, thanks in advance, Thomas.