Trixbox 2.6.1 - Package update help

Hi,
I just downloaded the trixbox, I installed it and config, a cisco 7960 which works now.

I am running into a problem with packages. They keep on saying missing this and miss that. I did yum install update. after that. there are still many package which need to be install. is there a cmd which will download and install all of the new package.

Please help, been working on it for 3 days and still not luck.

Thank you