First, WELCOME to the forums!!!!!!!
Second, The set you refer to is an older set with VERY VERY low quality.
DISC ONE: [DVD] This disc has all the Dr. Gonzo Extras and some VHS to VCD rips of the FOUR original making of's - it seems the disc was reauthored and MAYBE shrunk to get almost 4-5 hors of stuff on the disc (I threw this one away as the quality was so low)
DISC TWO: [PAL format DVD] The Forgotten Scenes is a cool disc and NOT very professionally made as they put Jedi before Empire in the menu!! (I tried to do a NTSC conversion but the results were poop - BUT I did reauthor the disc with the correct layout
)DISC THREE: [VCD] "This VCD includes an alternate ending for Return of the Jedi in workprint form" - this is really ONLY the SPECIAL EDITION animatics from the Making of the SE special
- the rest of the disc is an jumble of clips from the Casting Auditions and some rehashed deleted scenes from the above DVD (I still have a copy of this one somewhere 
) Again, WELCOME and thanks for posting thei info - NOT many people know about this unless they browse eBay. Also hit me up for my list if your interested - I have all the Making of's from the US laserdiscs and VHS tapes
RiK