radhaaswamees and nirnakarees both believe in some living person as their GOD. they do read lot of guru nanak dev jee's banee and some other bhagat banees but other than that i don't think they following any rehit, follow what sree guru granth sahib says (or even take guru granth sahib jee as guroo). don't ever fall for these as they are not in any way sikhs.