Regarding your SketchUp question:

There is no real way to figure out universally how to create GridMatch in an imported object. For instance, if you create a Cube in SketchUp 3 x 4 x 5 inches, and import it into Vue, it says the Vue Units for it are: 1,1,1. So, in this case, the Vue units are scale factors. Since we don't know the original dimensions, we can't calculate for exact grid match, not to mention the fact that we have no idea how the UV mapping is done for imported objects.

Your best bet is to import your object, using Simple SketchUp 3D objects where you know you need to create a grid model. Then select the individual 'parts' and right-click and select "Replace by (Fit Object)" and choose "cube." Now you will have a cube in the exact same proportions and location as your original object. And, you can use GridModeler to texture it.

Hope that helps.
-Chipp