replacing them is very easy.
trace around the hinges on the body and on the door. because that should have the perfect alignment.
simply unbolt one hinge and bolt the new one up and do your best to line it up with the outlined trace you did. and then do the second hinge. very easily. hardest thing for me was geting to the 2 bolts on the bottom of the front fenders. you have to remove the lower plastic rocker panel to get to them. remove all the little plastic screws and retainers from the bottom of the rockers and then slide the whole rocker panel towards the rear i believe, then remove the plastic splash guard around the front wheel so you can get to the 1 or 2 bolts from in there around the front headlight, then remove the 4 or so bolts ontop of the fender, then one more after you open up the door, and then the two on the bottom of the fender under the rocker panel that you just removed.

sounds complicated but its really not just a bit time consuming....