Are you concerned about viewing order? 3 125 minute movies would allow an interesting presentation. About 85 minutes for ANH, 40 minutes for the first half of ESB ending with a cliff hanger (true identity of Yoda or hanging on the SD?.) The second could be about 45 minutes of the last half ESB ending with a cliff-hanger, then 80 minutes of a TG style PT ending on a cliff-hanger. The third movie could be 30-40 minutes of PT where everything goes to hell then 85-95 minute ROTJ.

Actually for parts 2 and 3 I'll do some rearranging of events, so I can allow part 2 to end right as Darth Vader reveals the truth to Luke. I wouldn't want to be left with just ROTJ for part 3. Part 3 will start off like Return Of The King starts off, showing Anakin becoming and living as Darth Vader.