Project Gotham Racing 4 doesn't race onto Xbox 360 until next month, but Xbox360Achievements.org is already exposing how you'll add 1000 points to your Gamerscore playing the game.
Of the 50 Achievements listed, the hardest two involve reaching the rank of Hotshot and Professional. Pulling this off earns you 70 points for each. This is followed by a pair of 50 point achievements, Numero Uno and Whitewash. You'll have to reach rank number one on the single player career drivers' leaderboard and win every event in a single player or ranked match championship to get the 100 points between these two.
Project Gotham Racing 4 is scheduled for release on October 2, so look for it four Tuesdays from now.