I already did that shortly after I posted my original message. I simply could not afford wasting the email campaign resources by pointing interested respondents with the Web Deploy version.just unmark the "Enable Web Installation" feature in your SB project and recompile. SetupBuilder will generate a single-file installer with the same .exe name.
Basically I am no forced to create a response arrangement where I send the respondent a HTML page that is not linked to any of my web site's pages. In this HTML file/page they will find a download link to the non-Web Deploy version. There is no way that I can make the 400mb EXE public as a result of this problem, because as I mentioned earlier, EXEs that are linked in public HTML files get downloaded by search engine spiders.