Not really a Jarre fan meself, but am a huge fan of some of the other 70's synth guys:
Tangerine Dream mid-70's to mid-80's period (not keen on the other material), Vangelis, Klaus Shulze, Robert Shroeder, Johannes Schmoelling's solo material are particular favourites. Ricochet Pt2 also a favourite of mine.
However - any tips on re-creating patches commonly used by any of those guys (Jarre included) would be very interesting to read.
I haven't delved too deeply into the details on exactly how those guys did their stuff, but there are some obvious bits and pieces.
TD in the mid 70's were very fond of what sounds like a Mellotron flute. Not sure if they did it via Mellotron or had another way of reproducing it though.
Vangelis leads (I think) were typically pretty simple and raw Minimoog patches. Nothing overly complicated. He was also famously a heavy user of the Yamaha CS80 for strings etc. I guess that's something quite hard to emulate with something like the virus since it had a fairly unique polyphonic aftertouch feature.
A wiki page or forum section describing how to recreate specific sounds from the ground up would be brilliant IMO. Full descriptions might allow people to come up with methods for reproducing on a variety of synths.
Good thread!