Need For Speed: Most Wanted 5-1-0 (PSP) help?????

I need help with Need for Speed: Most Wanted 5-1-0 (PSP). There is a Track I am having a hard time mastering. The track is called City Power (direction: Forward). It has so many curves that I am always crashing against the walls.

I am at level 3 right now. I am using the Gallardo Lambo. I have access to other vehicles. Maybe someone that has passed this game, can tell me some tips on how to beat this track? Maybe with a certain car? Thanks in advance!

I don't know much about the game, but this might help!
http://faqs.ign.com/articles/680/680873p1.html

This might help you get upgrades, but the best you can do is look up on google Need for Speed: Most Wanted 5-1-0 Walkthrough and see if you find anything!

I am now at level 2.. competing with the Boss of level 1.. he is tough.. he has a faster car than mine.. having issues beating that race... any tips??

Well I was able finally beat each level (have a green check mark in each game) and have unlocked all cars and beaten all bosses.

I am surprised that the last car (M3 GTR 2) cannot change anything to it.. like I can't even change the colors.. But now that I have unlocked all cars and have passed all races.. what is next? Am I finished? Is there anythinng more???