I built my whole system from scratch by following your bible. It's fantastic. Well done. If this was a university paper you would now be Dr Ben Sharif. It's a good thesis. Tomorrow I will Paypal you $50.
Hi. It has been mentioned in the past that one should not update their freepbx. There's significant risk in breaking your system (things stop working etc). The safest way to keep up to date is the use the command yum -y update.
You are keen!
I think you can just log on to your Linux box.
Login and password and then type:
upgrade -y yum
This will update your Elastix to the latest version and this command is stable. It should not break anything. It makes sense to backup your system before you upgrade though...