Not sure which cult mod your talking about specifically (or if there even is multiple), but I use the call of cthulu cults mod as well as this Star Wars mod and it seems to be fine. However the gods selected to worship are unrelated to the Star Wars universe, so while your colonists can be sith/jedi, they'll be worshipping something unrelated and the cult is kind of a separate thing.

I think he is asking if they can make the Sith/Jedi into a cult that your colonists can join, like the cthulhu cults mod.