Yes this are the special edition ones. He also "touched" them up. For example, you will notice a HUGE difference at the end of Return of the Jedi when Luke looks over to see the "ghosts" (don't wanna share what Lucas did on the board, just in case not everyone knows what he did (I read it in the newspaper) or hasn't had a chance to watch yet).
I HIGHLY recommend the special feature on the fourth disc, The Return of Darth Vader. It is AWESOME!!!! It seriously makes me wish May was here and eppy three was out. I'm such a dork, I'm so excited