Blender/Complex collision models/HELP

i74s

Hey,

So I searching or asking for tutorial, "Complex collision models" in blender.

So far http://developer.valvesoftware.com have a great step-by-step tutorial how to make simple model/prop.

But how to make for example table ? from couple objects how to unwrap them..

I find only this one, about basics, but how about step-by-step ?

http://developer.valvesoftware.com/wiki/Modeling_props_with_Blender