I would be grateful if someone could help me setup the following items
by scart leads, seem to be a bit confusing, thanks

TV
AV1
AV2

DVD Recorder
AV1 TV
AV2 Decoder
-RF in
-RF out

Satellite Receiver
TV Scart
VCR Scart
-RF in
-RF out

Set Top Box (Freeview)
TV scart
AUX scart
-TV aerial
-TV/VCR