Ok, what I mean is that I don't recall and I can't seem to find it anywhere, is if the scene with Declan Mulholland acting as Jabba was in the final cut from the original Ep. IV or if it was cut (for resources problems) and then used in the later special editions with new fx, and the CGI Jabba?
The original scene with Jabba as a human was filmed for A New Hope, but George Lucas originally never intended Jabba to be a human.
He explained the reasoning for the cut on the Behind the Magic CD-ROM. From an article about it:
"When I first shot the scene with Jabba the Hutt, I knew I was going to create some kind of stop-motion creature...I had to have somebody--an actor--play the part so Harrison had someone to play against, so we just picked a big guy and put him in a fuzzy vest. I, at that point, felt that he may be a character somewhat like Chewbacca, a big furry character. We shot that. As we were cutting the movie, [we] realized relatively quickly that we didn't have the time or the money to actually shoot that scene [the stop-motion optical]. That ILM was pressed way beyond what it could pull off as it was. So I had to abandon that sequence pretty early on. I had to cut back on special effects shots and that sort of thing because ILM just couldn't handle it."
As the article goes into, the statement doesn't hold up to complete scrutiny, but the possible explanation is that he shot the scene anyways, but that it ended up being largely unnecessary. The footage with Jabba as a human was cut from the original theatrical cut and original home versions of the film.
With the Special Edition, a number of scenes were edited or added back in, including the docking bay scene, now with a (less than good) CG Jabba.