I'd be glad to help, but the problem is that it's been so long since I did the install that I don't remember a lot of specifics.
I do remember an issue with screw length, but I think it was resolved without buying new screws. The only other caveat I can recall is that the cables were mislabeled, but if you know that going in, it's no problem.
Cutting the bumper is no problem, but it *is* scary!. Come to think of it, when I did my install I seem to remember that I didn't cut the openings quite big enough. That resulted in the lamps not seating completely in the opening, making it seem that the screws weren't long enough. Once I opened the hole a bit, the screws fit where they were supposed to. Still better to err on the conservative side, though and start out with the hole a bit snug and then use a Dremel to pare away the binds.
Maybe Mel can confirm this or correct me if I'm not remembering right.
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Chuck, Self-elected President, Vice President, Sergeant-at Arms and only member, of the now official Former Ody Owners chapter of the OdyClub, founded 2/02/2002.