STS ever make my mind disturbed for I don't familiar with PHP and embedded html before. I tried to edit footer.php etc. and found it is not so hard as it is. The second, catalog/index.php maybe won't be my default homepage later. So I decide to make the minor changes directly.
I want to add www.mysite.com/about.php www.mysite.com/sitemap.php in the mainpage, which would be www.mysite.com/catalog/index.php and redirect www.mysite.com to it, or, create a new index.php in root. So issues come when I do SEO, who is the site to push out, www.mysite.com or www.mysite.com/catalog/index.php?