I do Source Mapping but mostly for Portal and Portal 2. I'm the main mapper of Portal: Project-Beta, Blue Portals and I'm also a mapper for Portal: Alive and Kicking. I do mapping for other Source games such as Half-Life 2 also.
It was buggy and did not compute with Portals, forcing its removal. :(
i like the lighting in this, the ceiling light on the car has a really nice shading effect, its a shame you took it out