You need this for later so that you can generate the text that will tell your browser to load the guestmap within your page.
Now, in iWeb, you need to go to the page where you want your map to appear. Bear in mind here that you will be following the principles outlined in one of my earlier articles here, about pasting HTML.
Insert a text box the size of your map, width x and height y as you’ve defined above. In the text box type some unique text, e.g., GuestMapHTMLHere. Do not vertically align the text.
Publish your site.
Find the html page with your map on it.
You need to replace GuestMapHTMLHere with the following: