this is the face we are going to map:

Please note that if the face that needs a texture is not blue but white, u have to reverse faces, rightclick it and select reverse faces, u always want to be texturing on the blue side kuz the white side will be invisible if u dont use a texture on it, but the blue one will be ugly tiled if u dont map it.

now we need a texture to put on it, dont worry about the aspect ratio of it, just use any size in sketchup, we worry bout aspect ratio in previewer, not here, i usually use a one colored texture with letters on it to see if its mirrored or not.

this what i used here:

Now fill in the face with the texture:

Now rightclick the face, select ''texture'' then click ''position''

As u can see its mirrored, so rightclick it again select ''flip'' then click ''Left/Right''

Now just drag the pins to the edge of the square and press ''Enter'':

Now this would be a perfect time to make a template for the face:

In this case the face whas on the front side of the mesh, so i goto ''Camera'' then select ''Standart'' and click on ''Front''

Then i rightclick the Face and click on ''Zoom Extends''

now make a screenshot by pressing ''print screen'' Im using gimp so i paste it in GIMP then i select the 4 corners of the square and crop the immage to my selection, then ure template is done (dont forget to resize it to a acceptable size, but keep the aspect ratio the same!):

Now we're done with the face. Dont forget to export to ''Google4 *kmz'' and not ''Google *kmz''