But this will only start the app upon a user login, not when the machine starts up.
I think the relevant directories are /System/Library/StartupItems and /Library/StartupItems. The former is supposedly for system-installed startup scripts, whiel the latter is for user-installed scripts. The existing scripts inside are pretty much self-explanatory to start you up.
If you're using Tiger, I think the new model is launch daemons, located inside /System/Library/LaunchDaemons and /Library/LaunchDaemons. But I'm not too sure how they work...
Thank you all...
this was worrying me since I only knew about the place in the system preferences and I was like "whoa...why is my mac doing something when I have no idea how it's doing it"