Tech Support Needed Configuring LAMPP to point to a new MySQL Instance

I have a LAMPP environment in which someone has installed a separate instance of MySQL.? All of this is on a single RedHat Linux machine.? I need help reconfiguring LAMPP so that it utilizes? the DB on this separate MySQL instance. If you are familiar with LAMPP you understand that it installs MySQL for you automatically and it works correctly out of the box.? I need assistance reconfiguring LAMPP to use a MySQL instance that was installed independant of LAMPP. I'm guessing this is really easy, but I just don't know how to do it. This project is to spend some time with me, sharing my desktop via VNC (or some other desktop collaboration tool) to teach me how this configuration works.? This will also include sending me some written notes on how to do it in the future.