Even better is this, a free VST that does that very nice organ sound on 'Crazy Diamonds' would you believe.
http://untermkittel.de/rumpelrausch/?PLUGINS It sounds like a nice organ sound with a nice slow Leslie thing going on. (great stereo too) It works very nicely. I am on a 32 Bit system and it works fine there but you may have to adapt if you are on 64 bit.
Richard Wright (Bless his Soul) was a bit of a later Kurzweil fan too. I loved all his playing. Very nice, underrated and very tasteful.
I have used this VST in some pop productions (more ballad) and the organ sound always sits nicely with a nice mix.
Update: I have been fiddling around with it and it is really a great slow setting (Chorale) Leslie sort of sound. It is basically one sound but you can change a lot about how it is modulated. 'Butter' and 'Cream' settings are quite different. The 'Milk' setting allows for a lot of initial starting options. Very nice slow moving Leslie effects can be heard. Put a classy longish reverb on it and it can sound even better. It is great when you modulate it further with things like 'Dimension D'