Help With Image Slideshow Thing Please

I’m a complete beginner with Flash, so all help will be greatly appreciated.

I have designed a website where I want a flash slider to showcase my work. I have three images showing, with a next and previous button to rotate all three. I have 20 something images I’d like to rotate between, but have no idea how to code it. I can find loads of stuff telling me how to rotate with one image showing, but not with one button between three images.

Thanks again