Hi Mike,
I use a kodak 7.1 mega pixels camera (easy share) If yours is close to mine there should be a little picture of a flower on the settings wheel on top? I set to that and make sure light isn't directly on the coin because of glare. If you hold the capture button down gently (only half way) it will put a little green frame around the coin for centering. If its going to be a clear shot it wont have any red or yellow lettering anywhere around that green frame. It may look like you took a very small picture, but once you upload to your pc and crop it comes up nice and clear and large enough for detail.
When I need to really zoom in on detail, I put a 10x magnifying glass in front of the lense on my camera and repeat the same stpes as above.
hope that helps.