Han's shooting first, like the entire film, is edited identically to the original edit.
Han saying "Yes, I'll bet you have" was the most difficult editing job of this project, and required transitioning from laserdisc footage to DVD footage of Han's face during the shot.
2004 footage was used for the Obi-Wan/Vader duel, but the brightness/contrast on the sabers was altered to make them look more like lightsabers. In fact, this brightness/contrast alteration was done for the entire film.
In the first shot aboard the Falcon, Luke's saber was recolored to look more blue.
All the best.