Setup Macromedia Flash for Firefox

IMPORTANT: Make sure NOT to allow Firefox to automatically install flash plug in. It installs the wrong version (8.?.?), which will not work.

To install the right version (7.?.?), I followed instructions found here using yum.
As root, I created a file /etc/yum.repos.d/macromedia-i386.repo with the following contents:

[macromedia]
name=Macromedia for i386 Linux
baseurl=http://macromedia.rediris.es/rpm/
enabled=1
gpgcheck=1
gpgkey=http://macromedia.mplug.org/FEDORA-GPG-KEY

Then, I closed firefox, and ran:
$ yum install flash-plugin

Test flash here.

Also run these commands:

[root@localhost zhupanov]# cd /usr/X11R6
[root@localhost X11R6]# mkdir lib
[root@localhost X11R6]# cd lib
[root@localhost lib]# ln -s /etc/X11 X11