I know my school use it, but I have no idea how. I don't have a SIMS account and have no dealings with it apart from when our server falls over and I have to reboot it.
I know our school had one of the c2k programmers out at our school on a regular basis to tailor the process to our school, so I guess you need to talk with your c2k guys (soon to be Northgate hehe) and get them to help you.