Newbie has some questions

Hello,

I've downloaded a FLA car racing games from this site:

http://lightforce.freestuff.gr/fastlap.php

I'm a newbie in flash but I need to get a result as soon as possible and I
advance quicker if I get an example to use.

I've tried to read and understand the code, I've changed the image's car and
now I'd like to go further.

I can't get the car's physics params. I've seen I can change the angle of
the car race every time I push left and right button, but where is the max
speed, where is the car's physic ? I'd like to add some physics to the car,
understand how it works. Could you please give the complete menu or procedure to follow to get those params and car's physics ?

Also how to create a new map for this games as I'd like to create a bigger
map and add a menu to select a few circuits further (that's not the answer I'm looking for, but if you hava a good tutorial, I thanks you in advance).

Thanks for helping.

Bob