PHP

I've been asked to re-do my school's webiste, an although I'm doing most of it with Frontpage, I would like to include a fourm. Can anyone tell me what I would need to learn to properly set up and administrate a fourm using the likes of www.simplemachines.org ?

Just in case anyone hasn't already heard: TH14 has been announced, surprising absolutely no one. As this is ostensibly a Touhou themed board, I thought it might be appropriate that there be at least one thread about this.