To install VLC Media Player, run the following in the terminal:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 7613768D

Then add the following to sources:

deb http://ppa.launchpad.net/c-korn/vlc/ubuntu jaunty main

Install Firefox 3.5 using Ubuntuzilla.  Using about:config, set network.dns.disableIPv6 to true.
Installation of Adobe Flash Player (credit): since Ubuntzilla installs a 32-bit version of Firefox, the 32-bit version of Flash Player is required. Download the tar’ed linux version of Flash Player from adobe and copy the libflashplayer.so file to the ~/.mozilla/plugins/ directory (create the plugins directory if necessary).