Complex sentence: Bernie Rhodes, who Laff knew back from his early days with Subway Sect was hired to manage them, and arranged the signing of the band with Epic Records after having McKean let go from the line-up and replaced with guitarist Danny B. Harvey.
Split into simpler sentences: Bernie Rhodes, who Laff knew back from his early days with Subway Sect was hired to manage them. He arranged the signing of the band with Epic Records, and also had McKean dismissed and replaced with guitarist Danny B. Harvey.