Everything from SE except Jabba, Greedo, and the gang getting into Mos Eisle scenes, and restore original shooting scene when they go rescue Leia.
ESB
Everything from the OT, except the battle of hoth, which must be from the SE. The difference from the OT is that they corrected some sort of "transparency" of the objects in that scene in order to reduce the matte lines.
ROTJ
Basically the OT, but include the celebration scenes from the SE (but keep yub yub music)