I'm using the latest version of Zen Cart and I have some unique needs for it. I've copied and modified a create_account.php inside of includes/modules to use _GET instead of _POST and it works fine when it's named simply create_account.php. However, I want to maintain two create_account PHP files, create_account.php (The original) and create_account_get.php (The duplicate).

What I'd like is:

http://site/index.php?main_page=crea...t?blahblahblah

But unforunately that doesn't work as I'm pretty sure i need to define this new php file so that Zen Cart recognizes it for main_page=XXXXX, but I'm not sure where. I've mucked around with it for awhile but can't seem to find a spot where I could register create_account_get.php so that index.php?main_page=create_account would work. Is there a process or a guide I can follow anywhere?