1) for the My Home initial view, there are some configs that if your users select to go to the main index on their display options setup, they will never be authenticated (can't login). This was the case with the boards I just finished setting up. So, I had to disable the my page option for the startup.
2) for HTML/Markup, thsi is an option that you can get to by editing each individual forum. Remember, allowing HTML markup can be a security risk.
3) Send replies....
Brett has a post on the Infopop forums about the change necessary to do this.
http://community.infopop.net/2/OpenTopic?a=tpc&s=729094322&f=5163077913&m=4133035614
4) The title is in your config.inc.php and can be modified from the admin panel.
Hope that helps and sorry for not answering in order but I was already typing the first answer before i realized it wasn't the first question.
-- paul --