jumping bean images

Hi, please help as I am quite new at this. I am creating a site in which the images need to go near the text that describes them. I get my images more or less in the right place using the image downloader but when I click on “update” they fo haywire! they go all over the page, but mostly to the bottom. Also, some of my text jumps in with other text where it has no business being. It’s like my update button is laughing at me!! is there a certain way or order in which to add images so that they stay put? thanks so much, Jan