I think your best bet is to run the:
redhat-config-services
tool. This will allow you to shutdown unwanted services so that they do not start when you boot up. You will have to restart for these services to shutdown or you can shut them down your self by doing:
ps -aux | grep <process-you-want-to-kill>
This will return a PID number. You can then kill the process by doing:
kill <PID number>
You can also run the 'top' command to see current processes.
