ok, a standard install of RH6.2 includes apache with mod perl and mod php3, I don't know if Dell changes that or not, I can't imagine why they would. Check your httpd.conf, which is the only place where any apache config directives should be these days. I have:
LoadModule php4_module /usr/lib/apache/libphp4.so
and I have commented out:
#LoadModule php_module modules/mod_php.so
#LoadModule php3_module modules/libphp3.so
Later, in the addmodule sections I have:
AddModule mod_php4.c
AddModule mod_php.c
AddModule mod_php3.c
the standard RH6.2 httpd.conf has the php3 'AddType' set up in a IfModule directive, so it doesn't load unless you are loading the module.
Then, finally, I have:
AddType application/x-httpd-php .php
The other possibility is that you didn't configure it as a module... my configure directive was:
./configure --with-mysql --with-apxs
the "--with-apxs" is what compiles it as a module.
Hope this helps.
D