How do i get software to start before anyone has loged in¯

Hey All, So i set up a OS X server to run File Maker, i'd i'm wondering if there is a way that i can get OS X server to start File Maker before anyone logs in. The main reason i'm asking is I set the machine up one night and didn't have time to set up a user to run filemaker, so i left it loged in as admin. And i put a password on the screen saving, Well wouldn't you know it the Owner of the company comes along and wants to "set things up", see thats theres a password on it. well he restarted the computer, as the store was open adn they needed filemaker. Lets just say i had two messages on my phone and the other guy that knew the password had 7 messages. sorry its' a little long. Tim