This is a simple walkthrough of how to install Prism in Ubuntu Hardy Heron. As usual I take no responsibility for anything that happens.
First you open the terminal.
Second you type in this command to install Prism: sudo apt-get install prism
Now as seen on Tombuntu.com you can get your gtalk running under Prism:
“…are available at the moment, you can apt-get install or use your package manager to install any of these: