Load custom location.xx.inc file

Hi,

I use location to register some french address. In france, we don't only have province field. We have "régions" and "départements". A region contain several départements.

For the website I'm making, the user only need to select regions. ATM, location include file for france work with departments, so I need to load another location.fr.inc file with a list of regions only.

The problem is that I don't know how to load my custom file, I copied and altered location.fr.inc file into my theme folder, I need to load it now, how to do that ?

At the very least, I could copy location module to /sites/my_site/modules folder instead of /sites/all/modules folder, but I would avoid to duplicate a +11MB module and to hack it just for that, so a solution to do that, in a drupal way, without hacking module core is welcome.

thanks

zmove