that makes no sense
I will show you.
If you want, download Milkshape and try it yourself.
Create your model.
2. Assign all parts of your model to a material.
Multiple materials can be used, resulting in multiple shades:
Full Color = blank.png
75% Color / 25% Black = black25.png
50% Color / 50% Black = black50.png
50% Color / 50% White = whiteCheck.png
25% Color / 75% Black = black75.png
3. Select all faces that you want to be flat-shaded.
4. Click the 'Vertex' menu and choose 'Unweld'.
5. Under the 'Groups' tab, uncheck 'Auto Smooth'.
6. Click the 'Vertex' menu and choose 'Weld Together'.
Pictures when I get home tomorrow.