2
you could either move it from the portal folder into the main root folder, or you could change your domain start folder to the portal folder, thus making the portal folder your root as such..
of course, either way you will need to edit mainfile.php to reflect on the change..
ie.. change
http://yourdomain.com/portal to yourdomain.com/
if you move the whole lot back into your root folder as it is, you will also need to edit the paths..
ie. ...../htdocs/portal to htdocs
if you change the domain to point to portal folder, you wouldn't need to change the paths only the URL's.. but that would make anything in your root folder as it is un-accessible to any1 typing in your domain name..
also any hardcoded url's in your files will need to be edited to reflect the change..