I think most will be covered already but i'll just state what Grp A RS500's i know of:
Raced in Austrailia - Bathurst, Sandown 500, ATCC etc etc
-Benson and Hedges Sponsered ones, run by Alan Jones and Tony Longhurst in Austrialia in the late 80's
-Mobil 1 sponsered Sierra driven by Brock in the late 80's
-The DJR Sierras driven by Dickie Johnson and John Bowe
-The ANZ Banking team run and driven by Allan Moffat - the first cars were Rouse prepared then Allan shifted and drafted in Rudi Eggenberger of the Eggenbereger Seirras so run newer ones.
-Peter Jackson racnig Sierras - Glen Seaton - more info here:
http://www.ibcholdings.com.au/cars/sierra/index.html
ETCC -
Eggenberger Cars - already covered
Brittian - BTCC
some decent video footage can be found here :
http://www.rsownersclub.co.uk/video/
ICS Team - Rouse
Labbats Team - Tim Harvey, Guy Edwards
Trakstar Team (ex DJR cars) - Mike Smith and Robb Gravvet (see pic)
BBR (Brodie Britian Racing) - David Brodie
GGR (Graham Goode Racing) - Graham Goode
FAI Insurance sponsered - Sean Walker
other RS500 drivers that spring to mind that raced in Britain -
Karl Jones
David Sears
Jeff Allam (raced at Bathhurst in a Johnson car IIRC)
Tiff Needel
Laurence Bristow
Asia -
There were quite a few RS500's raced over in Asia in the late 80's, the Eggenberger cars were campained there for a while i think. Also later in 1995 GGR produced the "Mach 1" Seirra rs500 which did surprsisingly well.
From 1992, when Graham accepted an invitation to race an RS500 in Malaysian Touring Car races, and rounds of the South East Asian Touring Car Championship, another very successful chapter in the Company's history began. In the following three seasons, Graham won every Touring Car race he entered - except one, where he finished second - competing against the likes of Nissan Skyline GTRs, DTM specification BMW M3s and Mercedes 190s.
France -
Alan Fertay (spelling

) raced Rouse prepared cars.
Thats all i can think of for now, im sure theres more....
more piccies from the 1990 BTCC here :
http://images.google.co.uk/imgres?im...l%3Den%26lr%3D