Recommned Way to Update AsteriskNow?

Hi there,

Please correct me if I am wring but AsteriskNow is the official distro for FreeBPX correct? I hope this is the right place to ask this qiuestion.

What is the correct way to keep the system updated?

1) yum update?
2) Update FreeBPX modules from WebGUI?
3) Running the update scripts? (http://wiki.freepbx.org/display/PPS/Updating+FreePBX+Official+Distro)

Thanks