So if I'm reading this right, you want to split the wine kit into 4:
RP15 + FT Rouge
RP15 + FT Rouge Soft
WLP750 + FT Rouge
WLP750 + FT Rouge Soft
That doesnt sound impossible, but if it's a 6-gallon kit, just understand that that means it's going to be ~1.5 gallons of 'must', which is gonna...