LOL! Okay, believe it or not I tried this a few minutes ago in uvmapper, just because I know it would be a good thing for me to learn to use that program. But I goofed it up and ended up doing it in Poser with the grouping tool.

It is really easy with the grouping tool. I set the six orthongonal cameras up first, so that I have the left, right, top, bottom, front, back of the box in view. I select the box, open the GT, and click on remove all. I then drag a square across the side of the box with the GT to select all polygons on the side in view ( whichever of the cameras I am using to view the box) and click on assign material and give it a name, like front, back, etc. Change camera views and repeat the steps again (remember to remove all first).

I also sometimes add a step to this and make each side a new group. So at the start I click on the new group button, name it, say front, (can now skip the remove all step since this group has no polygons selected) group that side and assign the material, click on new group, and repeat the process.

The second method has some added advantages as I can spawn each side as a new prop if I want. (You can also do this on a box mapped the first way by creating the new groups, then using the include materials to select the polygons to assign to that group. IE. front group, include material front; back group, include material back, etc.)

If I want to map both inside and outside, I would use the create a new prop on the mapped box, reverse the group normals, rename the assign materials by using the include material to add the polygons, than giving that side a new material such as frontIn, backIn, etc. So that I can use a different texture on all twelve sides. Scale the new box down from 100% to 99% or so that none of its polygons push through the first box (you want it to be inside) Then export both box as an new object (uncheck all settings) and import (uncheck all settings) as a new box object with 12 material settings.

Now, how would I go about doing all this in UVmapper?