Is changing the oil pump on a 2000 Cavalier 2.2 L 4 Cyl as simple as dropping the oil pan and replacing the pump (and gasket, and priming the new pump)? Or is it connected to the drive train and I need to take that out along with the front right tire? Also, since I am in there is there anything else I should replace besides the pump and gasket (maybe the screen? How about bearings)?

Any help would be greatly appreciated.