Welcome to LQ! The easiest way is to untar the codec file
Code:
tar zxvf <name of file>.tar.gz
Then enter the new directory
Code:
cd <directory name>
Then copy all the files inside this directory to the codec directory. I believe Linpus uses sudo, so
Code:
sudo cp * /usr/lib/codecs/
<enter your password>
If Linpus doesn't use sudo, just do
Code:
su
<enter root password>
cp * /usr/lib/codecs/
exit
You will need to be in a terminal to do all these commands.