For those who want round holes instead of square holes.
Check this out.Round holes.skp

I forgot to tell you that you steer and drive with the arrow keys.

I was looking thru the forum and I ran across this request. I like you, am also fairly new to sketchy physics. It has a fairly hard learning curve but with a lot of help from tutorial all over the internet I am finally catching on but still have a lot to learn.This is definately not the only way to do this but it works.
The main problem with your model is the wheels were not defined as spheres, the body of the car has to be set to no collision. I left all the joints in place so you can learn from them. You can choose the joints then right click and hide. I only used one drive wheel but can use two or all four, I just prefer using one, you just have to make sure their all turning the same direction.
I just had to answer this since I have had a hard time learning it. Hope this helps you out!

artfread

Nissan Skyline GT.skp

Here is the results from the Ruby Console.

Run su2pov
Error: #<NameError: undefined local variable or method su2pov' for #<Object:0x5d0f9e4>> (eval):155 Run su2pov35Toolbar.rb Error: #<NameError: undefined local variable or method su2pov35Toolbar' for #Object:0x5d0f9e4>
(eval):155

I am also having a problem with with this plugin I have windows XP SketchUp Pro 8 I was using su2pov 3.4 and it was working fine but when I uninstalled the the old one and installed the new 3.5 update Aug.31 edition(the latest).

I get this message:
Error loading file su2pov35 toolbar.rb
private method "split" called for nil:Nilclass

Any answer for this, please?
artfreak