Country and Setup Guide #00 - A general overview how you can approach tuning a car. To make it easier to apply the following country guides in this series. It teaches a general flow of finding a working setup with a (very broad) overview of what settings having what effect on the driving.

And also including a comparison of all new locations to DR2 ones, so the eager might already find good starting points.
The links to the mentioned old DR2 Setup Guides:
Monte Carlo:    • MONTE-CARLO / FRANCE | Country & Setu...  
Sweden:    • SWEDEN | How To: Country & Setup Guid...  
Australia:    • AUSTRALIA | How To: Country & Setup G...  
Spain:    • SPAIN | Country & Setup Guide | DiRT ...  
Wales:    • WALES | How To: Country & Setup Guide...  
Argentina:    • ARGENTINA | Country & Setup Guide | D...  
Poland:    • POLAND | Country & Setup Guide | DiRT...  
USA:    • UNITED STATES | Country & Setup Guide...  
Finland:    • FINLAND | How To: Country & Setup Gui...  
Greece:    • GREECE | How To: Country & Setup Guid...  
New Zealand:    • NEW ZEALAND | How To: Country & Setup...  
Scotland:    • SCOTLAND | How To: Country & Setup Gu...  
Germany:    • GERMANY | Country & Setup Guide | DiR...