To Start SER at boot

1. copy directory SER to /Library/StartupItems/

   cp -r SER /Library/StartupItems/

2. To start SER at boot time edit /etc/hostconfig and add a line with:

   SER=-YES-

To manualy start/stop/restart SER try either:

/Library/StartupItems/SER/SER start 
/Library/StartupItems/SER/SER stop
/Library/StartupItems/SER/SER restart