speed up camming process on moulds

hi all need a little help when it comes to processing my moulds in solidcam.
obviously my moulds are in two parts and at the moment i have to cam each side individually, even though the processors and endmils are identical that are used.
1 do i draw them and attach them as an assembly in solidworks
2 do i mate them and is there a way to put a gap between them
3 use the g 54 etc route although i would like to have both halves in solidcam so i process and cut them as a complete unit.
thanks