mod_rewrite or frames or ??

Hi,

I'm building a website with a lot of php scripts, so url's will look
something like;

http://www.website.com/foo/bar.php.

But, I want the address bar to show;

http://www.website.com.

Always.


Now, I know this can be achieved by using either frames or
mod_rewrite. Are there any other options out there???

Cheers.