Internet Explorer Developer Toolbar Beta 3
Brief Description
The Microsoft Internet Explorer Developer Toolbar provides a variety of tools for quickly creating, understanding, and troubleshooting Web pages. This version is a preview release and behavior may change in the final release.

Internet Explorer is a terrible, terrible thing. But hopefully this can help some. I have found firebug lite to be totally ineffective for IE 6.

Download details: Internet Explorer Developer Toolbar Beta 3