All cars:
In name selection type in "allporsche"

Cheat Codes:
Enter the "Create Player" option from the main menu, then enter one of the following names to activate the corresponding cheat function:

RESULT NAME:
All cars have 933 physics yraGyraG
Drive with Rally physics Dakar
Destruction Derby mode Smash Up
Small R/C cars Gulliver
Heavier cars fetherw8
Cops on most tracks in quick fuzzyfuz race mode

Tips:
Tip: Do not, repeat, do not, brake while in the midst of a turn, particularly when driving older automobiles. The EA version of an antique Porsche has a tendency, and probably rightly so, to seriously rock your world if you do, sending you into a drift from which you may not recover. Instead, brake early, turn smoothly, and accelerate on the exit.

Tip: There's no better way of ridding oneself of an annoying police officer than by nudging him into a passing motorist or solid roadside object.

Tip: Alternate routes are not always shortcuts. If you find yourself consistently slow on a given course, check out all the routes available to you before resorting to a different setup.

Tip: Go with the "front bumper" camera for the best results. Here, the program doesn't have to pump out cockpit and driver animations, so the frame rate is generally faster. Also, you get a better sense of the speed at which you are traveling, so you'll be better prepared to slow down for upcoming turns.

Tip: Torque rules. If you find yourself in a section where you can use a higher gear with lower RPM or a lower gear with high revs, go with the latter every time.

Extra Cash:
Need some extra cash to buy your dreamcar in evolution mode ?
Got to the used car screen , buy a wreck,Fix it (make sure you can afford it BEFORE you buy it)then sell the car for its current value.
Go back to the race selection screen and you can now sell the car with profit !
This works great with the real classics like
The 356 roadster & speedster ,The carrera rs
and the spyder.

999,999,999 account:
Use Gamehack (A Game hacking program) ,while in main menu,enter the evolution mode,get into the garage,write down your account money,then press Alt-Tab to go back to your desktop.After that activate Gamehack,select process-Porsche,then press the binocular(find).In the value section,write down your account value anf click the button find.Let Gamehack find the address first and after it finish,double-click on the address and enter 999,999,999 but don't 1,000,000,000 and above because it will decrease your account.After that,close Gamehack,and then press Alt-Tab again to go back into the game and now you got yourself 999,999,999 account.