This plugin brings the great Multibox from phatfusion to your blog images.
Yes. When you make a link in the editor of wordpress, use the 'class="mb"' tag. Example: Open google in a window: Link zu Google (HTML in Multibox) When you make use of the rel="" tag, you can set an width and height of the multibox frame.
Yes, you can. Insert the image in your post an klick on the settings button on the image and go to the "advanced" tab. Fill out the field title and description. That`s it :)