Maybe I need to explain a bit more. I currently have a number of sites using PHP/MySQL and, of course, using index.php as main entry. I'd like to move them to Ez over time.
However, I don't see yet a way how to achieve this without a complicated directory move, so I had the idea of just using a different index.php, e.g. index-ez.php. I then could implement the site with eZ, have my users starting to fill it with content, etc.
Once we're finished, I just remove the old index.php and rename index-ez.php to index.php. I'd have very little downtime and almost no risk of something going wrong.