how do i make my blog url, whatever.com/main.html

[Cleo]

I'm not sure how you change your blog's default index page but you can add a line in htaccess to change what is the default index page.

DirectoryIndex warning.html index.html index.htm

The above will cause warning.html to become the default index page and if that isn't found then index.html and if that isn't found then index.htm etc.