I think we'll need a little more info to find out what's going on.
What files are in the directory that you're loading into php?
Did you restart apache after the install?
try and see where php is looking for the ini file: (type php --ini on the command line) then locate php.ini and copy it to where its trying to find it.
Also if you run php --info from the command line do you see your modules loaded?
Did apache get the php plug in?
Post back with some more details and we'll see if we can get this worked out.