Creating custom php.ini files.

[doublehops]

I have created several virtual hosts by modifying httpd.conf which is wokring fine. I want to have these virtual domains use a custom php.ini file overiding the master one. I have seen this done with some hosting companies but also need to do this at home. I have tried putting some custom files in the root directory of the virtual domains but they are ignored. What other changes are required for these custom files to be read?

I am running FreeBSD with apache 1.3 and php4.

Thanks,
Doublehops.