php 5.1.4 rpms for rhel 4 have been added to the rpm downloads section. These are based off of the current fedora core 5 rpms with the following changes:

* shared hosting security: removed posix functions [shared hosting security]
* removed pcntl functions [shared hosting security]
* added dummy domxml package [compatibility with other packages that depend on it, such as certain plesk 8 packages]

This build does have cgi compiled with fastcgi support.

Additionally, there is a corresponding php-apc 3.1.0 rpm available in the downloads section for this build of php.

To get these files with up2date, add my rpm signing key:
rpm –import http://www.justinsamuel.com/downloads/rpms/RPM-GPG-KEY.js.txt

And add this line to your /etc/sysconfig/rhn/sources:
yum justinsamuel-com http://www.justinsamuel.com/downloads/rpms/redhat/el4/en/$ARCH/js/