Multirom for m7spr topic

I am looking for a way to port the multirom on to our sprint varient I have seen it has been ported to international and Verizon but no support for sprint seeing as there is already a basis to start on how can it ported from Verizon to sprint since there are many Roms and firmware being ported from Verizon, please do not ignore this as many developers on here have as I have tried to multiple time getting answers on how , there's a guide somewhat for porting on multiroms op but doesn't make clear of everything to do so. My m7spr is up for testing