Help with icons


sorry for the newb question, but I want to change icons,
I have launcher pro, open home.
what else do I need, and how do I do it


I have figured out how to use custom icons for everything except the Dock. How in the world can I change the icons in my Dock? I want to replace the Apps Drawer icon w/ a custom icon. When I choose to replace the icon and Custom Icon, my only options are for jpegs in my gallery and I want to use PNG files. I noticed in Visual Desktop I can select the icon I want, but I can't figure out how to select the App Drawer action/app.