I just get frustrated.
I went from shooting app. on MY rebel XT to the D200 getting dropped in my lap and told they need good macro pics
this is a decent canon learning site, obviously the concepts will apply to any camera
http://web.canon.jp/imaging/enjoydslr/part1/1B.html
have a look I bet they have something on macro, macro is really simple once you get the concept
this page seems to touch on it http://web.canon.jp/imaging/enjoydslr/part1/1Ga.html