Slow, CGI-based method. VERY slow PHP. Requires a php_cgi in
every person's cgi-bin, and won't work on the main site or for
users without vhosts.
http://www.faqts.com/knowledge_base/view.phtml/aid/16339/fid/31

An apache patch taht effectively executes PHP scripts as CGI's,
except it makes this a globally controlled default and should
work for people with no vhosts.
This will be slow, but not as slow as the above one.
http://www.localhost.nl/patches/apache_1.3.24-php-suexec-patch


(this is the one we're going with)
And this might be an even quicker and cleaner (and faster?)
version of the above patch!
http://www.pfy.nl/suexec.html