Ok I found a really good way to get my URL's to be like:
http://www.domain.com/page/123/
Basically in my .htaccess, I do:
<Files page>
ForceType application/x-httpd-php
</Files>
For every file that has to be affected. And this works great too.
To get the URL into usable variables, I do:
$URL = explode("/",$PATH_INFO);
I am wondering, how can I set the $GET variable to use the variables in $URL's array, so I don't have to change every line of code I use $GET in.