so basically you have two dishes right one for 119/118.8, 2nd for 61.5 u can use 30inch dish to get 119 and 118.8 , (u need a special lnb to get both 119 and 118.8,) for 61.5 any lnb wil work..
you need to run cables from each satellite to diseqc switch then adjust antenna settings and scan for 118 you will need a special circular lnb for 119/118 then on switch you hook up 119 to port 1 118 to port 2 and 61.5 to port 3