I got this from Add/Remove Software

> Add/Remove Software. Alternatively, you can type the commands system-config-packages or pirut at shell prompt.

I am am using GUI to install all packges "GNOME Desktop environment" that took a while - there was non under KDE (K Desktop environment ).
ALSO
there was no reaction to system-config-packages or pirut at shell prompt.
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I will now retry your previous suggestiion using : $su followed by #yum install *.rpm