http://www.backports.org/dokuwiki/doku.php?id=instructions
1. Add this line
deb http://www.backports.org/debian etch-backports main contrib non-freeto your /etc/apt/sources.list.
2. Run apt-get update
3. All backports are deactivated by default. If you want to install something from backports run:
apt-get -t etch-backports install “package”
If you are using etch and you want apt to verify the downloaded backports you can import backports.org archive’s key into apt:
apt-get install debian-backports-keyring
めも