Late to the party as usual, here is a breakdown I pulled from the parts breakdown of the roof assembly, hopefully this will help you with the removal, but as for complexity, its not very complex to remove or reinstall them, there are 8-10 bolts that hold the roof outer shell to the top of the cabin structure, once you have the bolts, out gently lift up the back place a small piece of 2x4 in there as a prop to hold the back up while you disconnect the lights, once you've got them disconnect repeat on the front side the have a buddy help you lift it up and slide it gently down the side of the cab and preform what ever work you need to do.