Nice tutorial, thank you
But it's much easier if you pretextur your model in SketchUp before you export it to Crysis.
You can use this texture:
You can make several textures with this material, all with different colors, otherwise you'll lose the overview, which creates a new submaterial for crysis.
Set the size of this textur 1 meter x 1 meter in Sketchup. The textur in Crysis will have the same size (1m x 1m).
So you don't need to set up the tilling, it has automaticly the same size.
If you export the model to Crysis it overwrites the textur and you have to replace the textur with the diffuse you want to use.