Attaching Multiple Bump Maps to an Object

I thought that one could not attach more than one bump map to a texture; however, I discovered a simple tutorial that demonstrates how simple this is.  I can't believe it...

Anyway, open the two images under the Hypershader under the texture preset File, or just use a couple of presets.  Connect each one (using the middle mouse button) to a Bump Map 2D preset and give it a default relationship.  Then, create a texture, and create a bump map relationship between the first file and the texture.  All of the steps so far should be as if one were normally creating a bump mapped texture.

The next step takes a little more explaining.  Connect the second bump map to the first and go under 'Other' to create an outNormal->normalCamera relationship.  If neither of these two shows up, go under the Left and Right Displays and check 'Show Hidden Objects.'  Once of this is done, render out the object, and it should have a bump that has the appearance of both images.

This is what it would look like with a Bulge and Mountain preset as the bump maps.