WHoa! If you need to be told how to do this, you probably aren't ready to use unstable!
When I made the statement I wasn't implying that I want to move to unstable I just thought that possibly there was a backport link that wasn't in my sources.list file which is why I attached it. I don't want to go to unstable I simply want to get GTK 2.8 and I was hoping there would be a way of doing this without going unstable.