Staghorn fern help...

[Jerm]

Hey guys, my first post here and it isn't about orchids, sorry. I picked up a staghorn fern today that someone was throwing away. I have always wanted one of these but never took the time to start one. This thing is huge, I could barely lift it into my car. Part of it has died but part of it is very much alive. I would love to do what I can to save this amazing plant. Should I take the living portions off and start a new fern or should I remove the dead parts and try to get it to fill back in? Right now it is in my car since I picked it up over my lunch break from the office. I will try to post a pic of it tonight or tomorrow.