hee hee... i played this game on PS2. completed the game last week
if there's no races on the map screen, and u get ur visual rating to the max already (except for the rest of the unlocked parts), there r 2 ways in getting urself out of that stuck situation:
1. jump back to garage. select world map option and see what r the uncompleted races.
2. stroll around the map, there r races hidden in some corners that r not shown in the radar map.
the last car i have completed this game wif was the gt3000. modded until kanasai, whole car black black, full carbon fibre, but got a 10.00 visual rating
the top speed i ever reach wif this car was 398 km/h on a highway, assisted wif nitro, of coz...