Is it possible to write a script in Perl that opens different URLs and saves a screenshot of each of them?
You could also use Win32::IE::Mechanize to render the web page using IE, and then Win32::Screenshot to capture the page. You'll probably have to do a bit of work to figure out where to take the screenshot, but that shouldn't be too incredibly hard.
This will be a Windows platform only solution, of course, but may suffice.