how to wrap text around images

Hi,

WP2.5

I’m just trying to fix my theme to float all images in the posts and pages to the left or right, at this point it doesn’t matter very much, it’s just so annoying I need something. I know this has something to do with floating it with css, and I’ve read the image tutorial on how to very specifically make the changes I want, it appears where physically to place them inside the stylesheet causing me some grief, could someone tell me whereabouts inside the stylesheet this is usually done? I’ve looked at all the image entries, but when I try to put the float code in it messes up my theme.