Multiple UV in 3ds max 7


Hi all,
Im using 3ds Max 7 and I have a little issue I cant really solve after reading several posts and sites that talked about this. what I need is to have 2 uvs in same model, I try to export this for unity as it requires that feature to bake the shadows in the model but no matter how i try always get a single uv in the model. Could someone please tell me how to achieve that? thanks a lot beforehand =)