I am copying my site, and the sites uses ISAPI rewrite rule.  So, we have URLs
like www.domain1.com/speakers, www.domain1.com/guests.

HTTrack is rewriting those with .html extensions, like
www.domain1.com/speakers.html, www.domain1.com/guests.html

Any way to stop this?
Or, ideally, HTTrack would create index.html files for these, like
www.domain1.com/guests/index.html, www.domain1.com/speakers/index.html

Any assistance appreciated.