Thank you very much for your help.
The "scary" message i saw was probably a general warning saying that it was not a good idea to run graphical appl. as root. But now with your help I know how to run it with yum.
And if anybody can explain in a few words how YUM works that would be great. What I want to know is how yum updates the system? Does it download the latest rpm's and installs it or else... How to make sure i get the latest rpm if using yum update/install?
Thank you very much again.