As Squeeze moves on, we need to adapt the underlying MintPPC software too from time to time. A recent update in Squeeze prompted us to setup a repository, just like Debian and Ubuntu uses. A repository is a storage location from which software packages may be retrieved and installed on a computer. If MintPPC releases a newer version of its software, it will be uploaded to the MintPPC server and the users will get the newer software automatically, when the MintPPC system is updated. To make it work a few lines of code need to be typed in the terminal. Don't worry, it's not complicated. Just follow the following steps.

 
Open Terminal (Menu -> Terminal)
In the terminal type:

gpg --keyserver subkeys.pgp.net --recv-keys 36885F6D
gpg -a --export 36885F6D | sudo apt-key add -  

Then we need to adapt the repository list, in the same terminal:

  gksudo gedit /etc/apt/sources.list 

In gedit, scroll down to the bottom and add the following line: 

   deb http://www.mintppc.org/repository isadora main 

Then save the file and exit gedit. 

Then again in the terminal:

  sudo apt update && sudo apt upgrade  

You will see that the system gets updated and one of the packages that will be installed is the updated mintsystem program.

If you want to browse through the repository:
http://mintppc.org/repository