there is a site
www.gp4sound.com you have a patch with the season 2006
have the pilots,cars sponsors,engines of this season
thers is a bug in the original game , made you retire in many races with electrical problems ,they have a patch that fix this bug
the only problem is that the site have some problems and i cant acess the site minutes ago
but if you google forums of this game they have links to acess the 2006 season
i saw one forum
www.grandprixgames.org that has 2006 patch