Sorry about that, didn't know the board existed. Anyway, I used apxs for my install string and could not get that to work properly at all. I had problems with the php mysql library files because they didn't link up properly with errno.h which I manually added to a few .c files to get around that. I ran into a few other problems after that as well.
Anyway, I decided to install as a module instead by compiling libphp4.a and recompiling Apache. This worked and I was finally able to get PHP 4.3.1 running.
I had to do this completely separate from the RedHat 9 Apache installation because I could not find a way to install over it or upgrade PHP easily.
So now that I've got things running finally, I just need to know how to tell PHP to look for mysql.sock in /var/lib/mysql. I created a symbolic link in /tmp as a temporary fix, but this feels wrong. Any ideas? Thanks!