Advance car collisions ?

Hi everybody,
I´m new here. Three days ago I started developing a top-car driving game. Car movement, and collision test was OK, but now i want to make some "effect" after collision. In real world, car change direction and rotation after crash. Can anyone help me to resolve problem with collisions? I also want to resolve problem when you crash into the wall in low speed, car should slide around the wall. I don´t know how to describe my problem soo, imagine box2D crashe physic. I need to do something like that, but without using any Physical engine. Something like game below without using physical engine http://www.emanueleferonato.com/down...wheeledcar.swf

Car movement is done with this code:
Rotation:
this._rotation += rychlost*wheel_angle*0.01;
wheel_angle is beetwen 30 and -30
X and Y cordination:
this._x = this._x+Math.sin(this._rotation*(Math.PI/180))*speed;
this._y = this._y-Math.cos(this._rotation*(Math.PI/180))*speed;
speed is beetweb 10 and -4

Thanks everybody for help and excuse my bad english.

PS: Is there a way to made this type of collisions without physic engine ?

If anybody want help me, please write here.

Your link doesn't work.
What's so wrong about using a physics engine to simulate (*gasp*) physics?
Your code appears to be AS2, but you posted in the AS3 forum.

Hi,
Sorry for that link, here is working link:
http://www.osmdam.wz.cz/wheeledcar.swf

I don´t think that there is something bad abou using physic engine, I just want to do it by my self. I tryed to use mathematical funcions, but result was terrible. So i asking for help.