Need help with PvE Shadow spec

Recently hit 60 on my Priest, planning on playing Shadow while I gear up in dungeons, was wondering if someone could help me out with a spec to use specifically for 5-man PvE.
The DPS-oriented talents are pretty obvious, but I'm not sure what threat reduction/utility talents are necessary.
If any experienced Priests could build me a spec I would really appreciate it
The DPS-oriented talents are pretty obvious, but I'm not sure what threat reduction/utility talents are necessary.
If any experienced Priests could build me a spec I would really appreciate it