How do I uvw a model at 3ds max?

Just a lil noob doubt, how do I uvw map a model at 3ds max?
Thx

select your model in one of the views then when its selected click the MODIFY TAB then scroll down to unwrap uvw then click EDIT and you should be able to do it from there

hum... for some reason the "edit" button is gray, like I can't click on it. U kno what I can do to make it available?

Take a printscreen and show me what's wrong.