see this post for more info: https://atomicorp.com/forums/viewtopic.php?f=18&t=3324&start=15

[php-cgi located here:]
/usr/bin/php-cgi

[In your /var/www/vhosts/domain.com/conf/vhost.conf file]

FCGIWrapper /var/www/vhosts/domain.com/httpdocs/php-cgi.sh .php
Options All

[In your httpdocs directory in a file called "php-cgi.sh" (set as executable)]

#!/bin/sh
exec /usr/bin/php-cgi -c /var/www/vhosts/domain.com/httpdocs/

[Put your "php.ini" file in httpdocs directory and set to your liking]

[Default settings for files and directories. Remember, if rights are TOO HIGH, you throw 500 error. A big problem for most people is that they follow the ill advised suggestion of 777 when installing those all too famous LAMP based apps and then get confused as to why they are getting 500 errors. It's the opposite, you don't need to go 777, 700 or 760 works for most directories, as well as 600 or 644 for most files.]

chown -R yourFTPname.psacln *
find . -type f -exec chmod 644 {} \; &
find . -type d -exec chmod 755 {} \; &

This should help someone. Please give back to the community.

Don’t forget to:
/usr/local/psa/admin/sbin/websrvmng -a -v &

Also:
psa-fcgi-2.4.0-2
psa-mod-fcgid-configurator-1.0-14
psa-mod_fcgid-1.10-3

So, do you know how to upgrade Plesk 9.2.1 to have a version greater than “psa-mod_fcgid-1.10-3″

I would appreciate any direction you might be able to offer.