Howtoforge published a guide about setting up Apache2 with mod_fcgid and PHP5 on Debian Etch

This tutorial describes how you can install Apache2 with mod_fcgid and PHP5 on Debian Etch. mod_fcgid is a compatible alternative to the older mod_fastcgi. It lets you execute PHP scripts with the permissions of their owners instead of the Apache user.

How To Set Up Apache2 With mod_fcgid And PHP5 On Debian Etch