get the ISO or the cd for the SMC. mount it somewhere and do either /cdrom/cdrom0/sbin/es-inst or if you have a display (X) /cd/cdrom0/sbin/es-guiiinst. After that choose production enviroment and install the Agent Layer (you''ll be asked for a path, community strings, ip of the server). After that you'll have to choose some addons. In my case (i have a SF v1280) i had to choose Sun Midrange Systems Addon and the Netra Addon (apparently the sf v1280 is actually a Netra). After that the script will run the setup for theese specific addons. When youre done start the agnet /path_to_inst/sbin/es-start -a. That's it really.