Tutorial: Re-arranging the UV map and keeping the texture

Mauvemorn just explained to me how this should be done. I couldn't make it work, but it turns out I was doing things in the wrong order.

1. You start by opening your file in Blender that has the original UV layout and original texture
2. Click UV_0 and then make a new UV map; the new map will contain the original UV_0 layout.
3. Rearrange your new UV map the way you need it. You'll now have the old UV layout in UV_0 and your new UV layout in your new map.
4. Assign the new UV layout to a new texture

    Note: To assign a new texture, first press A to select all of your UV islands, then, while the UV islands are selected, make a new texture. If you don't do it in this order your UV layout won't be assigned to a new texture (took me forever to figure this out)


5. Bake your texture
6. Delete the old UV_0 and rename your new map UV_0
7. Click UV_1 and then make a new map. Both maps will contain the UV_1 map's layout
8. Delete UV_1 and rename your new map UV_1