You need to create a texture, I suggest using GIMP, make it 16x16 pixels(You can use whatever size, but it will take longer to load and make the file larger). Save it as a PNG.
Go into Milkshape, use the
Materials tab, Press
"new".
Select the material, press the button that says "None" and import the texture.
Go to the
Groups tab and select the group you want to color, go back to the
Materials tab and press
"Assign".
Make a material, select a group, double-click the material, ??? assigned.
You sir are a lazy helper.