This is the most practical advice. Farming Simulator 2009 was not a good game. It is slow, buggy, and has a maximum resolution of 1280x1024. You are nostalgic for an idea, not the reality.
The "Gold Edition" included:
Websites like Internet Archive or MyAbandonware often host the full ISO files of Farming Simulator 2009 . Farming Simulator 2009 Gold Edition product key