Hi Paul
I can fully identify with your frustrations - been there!
A simple question may help you. Did you have a web developer, and are you still in relationship with him/her. If so, get them to do a 301 redirect from the www.simodal.com/index.htm to your chosen version. Most seem to do www.simodal.com/ - but with a trailing forward slash at the end. Someone else might like to comment on that.
Also as Aaron says also do it for the version without the www's ie: http://simodal.com/ and do a 301 to exactly the same URL as the above.
If you haven't got a developer there is some info around telling you exactly how to do it.
Hope this helps
