I can't get jcarousel to work

I've downloaded the jcarousel block and the jcarousel. I've copied jcarousel into the jcarousel block folder as I've seen advised in other forum posts. From there, I can't seem to add images. I can't even find a step by step instruction online on how to use this tool. Do I upload the pictures onto another site like flickr and jcarousel pulls it from there? Do I upload the photos from my site? I tried to add the jcarousel block to my left column of Marinelli and that won't work either. Thanks for any help.