I have installed zenphoto, and it's working fine. But I want to display thumbnails through the RSS, so other site can display them, just like Flickr badge.
Any help would be appreciated. Thanks...

Actually that is what our feed does. You might try the nightly build since a few things have been reworked.

I don't use Flickr so you might need a Media RSS feed, there is a third party contributionhttp://www.zenphoto.org/2008/01/hacks/#mediarss

Thanks acrylian. I'm trying it...