I found that if I log in to the Dude via the web using Firefox, then right clicking on a map image and looking at the properties, then map is loaded using:
If I navigate to this page, then only the map is displayed.
If I resize my browser window, then the map gets bigger and smaller to fit
I was planning to use the "Foxden" plugin for firefox to create a portal showing a mashup of maps and statuses from the Dude and other monitoring apps that I use (you just can't get all the best features in one app
But, there are three problems:
1) The dude uses a session key stored in a session cookie. If I restart my web browser, then the page can not be found until I log in to the dude again.
2) The image does not refresh (unless I have another browser logged in to view the same map, then the map will change if I refresh the page).
3) Doing this sometimes freezes the Dude's web server. The Dude Server keeps running and working (dude.exe #1); but the Dude Web Server (dude.exe #2) stops responding, and has to be killed with Task Manager.
*I was using Foxden, because neither Dude, nor any of the other apps allowed me to embed web pages from other locations within their web console.
Adding the complexity of a web server in my case (I have a control centre with a single 1.5m display allocated to the equipment that the dude and other applications) is a bit too much, but I can see how it would be useful for those of you running ISPs.