With regard to the .html suffix and the folder structure this kind of thing is achieved by making a couple of changes to the config.php file and using a .htaccess file with mod_rewrite. It's fairly well documented how to do this, see for example - http://wiki.cmsmadesimple.org/index.php ... l_Settings
If memory serves me correctly there is a sample .htaccess file in the docs directory which you can use.