The keyboards may have been recorded using a technique similar to what Tony Banks did for some of the Genesis keyboard tracks.
He had one side of his stereo tracks run through a slight delay, and according to him it really widened the sound. I briefly spoke with him about that the one time I ever got to meet him, at a backstage party following a gig at the Greek Theater in CA. (I got to watch the show from up on the stage, off to one side - what a fantastic experience).
Anyways, that's what he told me he did to widen his keyboard sounds on some of the stuff. I don't remember anything else technically - it was a quick discussion long long ago and I don't remember anything else off hand.
Bob Bone