2 Havok problems

[Roofy]

Hi,
I hate to bug you guys again, but I am still having some serious problems.
Basically the problem is this...
Firstly, so that everyone knows which 2 behaviour scripts I am using, they are
the create terrain behaviour script which I copied from the raycast jeep demo
and the rayCast script which I copied off from the Remote Control Car demo. In
other words, my project consist of 3d scenery that just consist of my car,
there is no hke file, and what is attached to my 3d sprite are the following
behaviours in this order

1. The Havok (no HKE) script

2. The create terrain script --> remember, this is the same script that is
used in the raycast jeep demo which you will find here
[url]http://director-online.com/havok/xdev/docs.html[/url]

3. The RayCast Script --> remember, this is the same script that is used in
the Remote Control Car Demo which you will find here
[url]http://director-online.com/havok/demos/demo-cardemo.html[/url]

after running this script, and as soon as the wheels touch the ground, the
chassis and the wheels fly all over the place. So my first question is this....

1. how do I stop the chassis and the wheels from flying all over the place? I
really do not know how to set my settings considering that not only do I not
understand Havok, but I do not even know that much about physics.

2. Second question is this, I wanted to know why the demo is casting a ray off
of some sort of wheelPointList calculation insetad of just casting the ray off
of the wheels worldPositions? For example,

the script uses this....
repeat with a = 1 to pWheelPointList.count
pIsHoveringList[a] = false
worldWheelPoint = tempTrans2 * pWheelPointList[a]
intersectDetails = pMember.ModelsUnderRay ( worldWheelPoint, \
worldDownDir, \
6, \
#detailed)

and I want to know why I can't just do this....
... note pWheelList would stand for the 4 wheel models built into a list that
would be set when initializeHover was called

repeat with a = 1 to pWheelList.count
pIsHoveringList[a] = false
intersectDetails = pMember.modelsUnderRay(pWheelList[a].worldPosition,
worldDownDir, 6, #detailed


if you need the entire script then let me know and I will post it here.
Otherwise if anyone could help I would appreciate it.

[Roofy]

Ok, I tried tweeking things by turning some of the lines of code to comments
which will disable it from being called. After disabling and reabling lines of
code I found out that by disabling the applyForceAtPoint at least that stopped
the chassis and the wheels from flying all over the place. However, the first
try after disabling the force, the car would not move. So then I increased the
accereation, and after holding the up arrow for about a second, the car
jigggled a bit and then sped off like 200 mph, sort of like someone was holding
down the car and then releasing it. So how can I get the car to move forward
like a car is suppose to move?

and BTW I would still like to know my second question from the above post