Hi,
also have a look at page 44 of the E-Book "How do I define what displays as the header at the top of the browser window?"
Anyway if you want to change it in MassReplaceIt because you deleted the TextBox by accident or so in each page published from iWeb if you open the page in TextWrangler you should find a line looking like this
Code:
<title>Blank page or whatever the title may be which shows up in the tab currently</title>
so instead of adding a TextBox to each page with a code in it and replace it you should copy the title line of the page and replace it with the title line you want to display instead.
Regards,
Cédric