For the extra tracks You just have to check
www.gargagames.com -> GAMES -> PocketPC --> GangstaRace and from the left menu choose Bonus Pack. We broke down the Bonus Pack into Custom tracks and added them to the download section, without taking notice to change the Bonus Track Page. Sorry. Now You ar eable to download directly from the Bonus Track Page. Remember to read the "How to install" and don't forget to check the download page as well!
Have a Nice Game!
Garga Games Team