I'm hoping the cams have slots in them for you to reduce the draw length, because an 18 year old bow with probably be very hard to find a new set of cams or wheels to shorten it. I'd first have the limbs checked out for cracks to splits in them, just for safety's sake. Your string, you will probably need to have custom made for the length and you can go with a winner choice, crackerized, or zebra. Peeps you might want to go with a peep that is assisted with alognment by tubing. These are easy to install and are reliable for consistant location on turning in the right position at full draw. Broadheads, I'm very partial to Muzzy's so I will have to recomment them and I would go with the 75 grain head, I've used them for the last 5 years with great success. Good luck to you and I would first try to contact Martin archery to see if they can help you out on shortening the draw length.