I've finished modeling the items in the living room.
First you make an object which is almost the same size and position as the character object. I used a smoothed cube for this. Then you bake its vertex colors with global illuminations by using Batch Bake command.
Then you make directional lights on the object with using a MEL script which I posted in the previous article. Each light's emitSpecular attribute is unchecked automatically by the script so the character object's specular is still sharp. At the last you unlink the lights and the background.
I'll explain this script's purpose next posting.