Hhelllpp please, basic navigation question

i need help with cs3…im having to manage a new sight and i have a lot of content and i need to learn a better way to navigate…this is how i used to do it in actionscript2, and it was a headache…

dummy_mc.attachMovie(“pic1_mc”,“dummy_mc”, 1);

can anyone help me come up with a better way to navigate using actionscript 3…maybe a sample file or just the code ? i just need to do one button that will open a nother button that will open an image…im very desperate, been trying to figure out how to do this all day!