Just use RPM from shell as root:
Code:
cd /place/where/you/store/your/updates/
su
(enter password)
rpm -Fvh *
This will freshen (update all your installed programs) with RPM. It won't install additional programs, for that you have to use switch -U instead switch -F. Switches v and h in that just displays verbose information and draws some hash marks so you can see how update progress is going.
Note that if you miss something which depends on another package, update might fail for that program. Search forums for using 'yum' or such. I have never used network alert update, but I think it notices that RPM-packages are up-to-date and won't try to download them again.