How to access etc/php.ini using Virtuozzo?

In on VPS with Virtuozzo, but can not figure out how to get access to the php.ini file within the etc directory. Anybody got instructions?

Does your hosting service allow custom php.ini’s or is it server-wide?

This post looked handy:
http://www.bodhost.com/web-hosting/access-to-edit-phpini-file/