Project Gotham

[Freb72]

Hi everybody,
I am currently playing Project Gotham and have unlocked all the cars except the F50. I am having a problem unlocking some tracks though. The ones calles Free Roam. I cant get them unlocked. If you know how to, please tell me.
Thanx, Cya

[MeSs]

i gave up and used cheats
MeSs

[ryan123]

Obtain all silvers or golds (no bronzes) in Kudos Challenge Mode for one of the four cities. Free Roam will now be open for that corresponding city. Repeat for the remaining cities' Free Roam. Straight from gamefaqs.