different PHP configs for multiple sites on same machine

Hi all. Is it possible to have different php.ini settings for different sites running on the same server (Apache)? What I want to do exactly is change the include_path on a per-site basis, without having to call ini_set in each page. I have the following: /home/vservers/cms.mysite.com /home/vservers/wwwdev.mysite.com /home/vservers/cmsdev.mysite.com And I would like to be able to run an individual php.ini file for each. I'm pretty new to administering Apache so I'm just wondering if this Is doable? Cheers, Pablo