Changing index.php

Hi,
I had an existing index.html so I added and I added wordpress to the root so my blog hompage is .com/index.php.
I use modrewrite.
Now my url for my permalinks show mydomain.com/index.php/archives/2004/…
Is there any way to use modrewrite to eliminate the /index.php/ part of the url and change it to /hdtv/?
I would also like to append an .html to the end of every arhcive page if possible
Thanks