As Dezzy has said Toby and myself made an A8 Track car some time ago
It is very handy on the track using slicks but to a point they mask an underlying understeer issue. I'm sure that it could all be sorted with modifications to the suspension setup but I think it would require the replacement of the multi-link suspension with fabricated adjustable replacements. There are some available but they are also rather expensive, just depends how far you want to go with it.
For us it was all about fun, a cheap car with readily available parts, a lightweight rolling chassis with a strong engine and gearbox. It makes a lot of sense when you think about it on those terms. The graphics are again just a bit of fun, a scaled up replica of an A4 BTCC if you will. Gets quite a lot of interest on trackdays especially once you have lapped most of the other cars.
Have a look on you tube for some in car videos
http://www.youtube.com/user/tobes49#p/u/17/anf74JOYjmA
