You have to remove the covers on the center pillars, where the seat belts are attached. also the sunroof seal, Followed by the trim around the top of the roof( i just puleed my gentley until it let go) then it just comes out. but be very carefull as it is real flimsy, a gust of wind would snap it in Half. Then just a case of sliding new one in and replacing all the clips etc. i think i paid about £10.00 from a scrappy for mine a while back. not sure on different colours though, could only find the grey type. hope this helps