The First example gives me a 404 error (maybe because theres no index.php in the root O-o)
The Second/Middle example makes the page look the same as if i Add DirectoryIndex /Forums/portal.php
So thats not what i need...
This dos exactly what i want except that it shows the url in the address bar ..
RedirectMatch 301 ^/(index\.php)?$ http://www.example.com/Forums/portal.php