If you want to enable it at startup, (assuming that you are using Linux), place a small file in /etc/init.d, and place in that file the command to load the script. Then, depending on your distrobution (you may not even have a /etc/init.d directory, in which you can place it in /etc/rc.d), you can either enable startup of this script by running the distrobution-specific (usually) program that will enable that script @ startup, for instance, in Red Hat, it would be the ntsysv command. In Debian, it would be the update-rc.d.