-#echo 'deb http://ftp.debian.org/debian/ testing main contrib non-free' >> /etc/apt/sources.list
-#echo 'deb http://security.debian.org/ testing/updates main contrib non-free' >> /etc/apt/sources.list
-#echo 'deb http://ftp.debian.org/debian/ testing-updates main contrib non-free' >> /etc/apt/sources.list
-#echo 'APT::Default-Release "stable"' >> /etc/apt/apt.conf.d/99defaultrelease
+if [ "$1" = "thinkpad" ]; then
+ echo 'deb http://ftp.debian.org/debian/ testing main contrib non-free' >> /etc/apt/sources.list
+ echo 'deb http://security.debian.org/ testing/updates main contrib non-free' >> /etc/apt/sources.list
+ echo 'deb http://ftp.debian.org/debian/ testing-updates main contrib non-free' >> /etc/apt/sources.list
+ echo 'APT::Default-Release "stable";' >> /etc/apt/apt.conf.d/99defaultrelease
+fi