Zulu
If you are sure that you have a 32bit version of Firefox installed, it should really be easy. The repo is already setup, if you did the tutorial setup ..
In a Command line console, just
yum install flash-plugin.
and
yum info firefox
should only return one instance of Firefox...
this work for me every time. If not....
do a
SmotlSendProfile.... paste the link here, and then we know what you have on your box.... maybe the help will then be a bit better..