Gp4 Builder resizing and adding objects

When I'm using GP4 builder to change object size or shape, I know you can use combinations of the X, Y, and Z co-ordinates to make objects such as advertising boards taller or wider/narrower. What I'm hoping someone can help me with is the ground adverts which don't use the same axis when re-sizing - is there a different method for re-shaping ground ads?

On a different subject, can anyone provide a guide on how to add the type of ground advertising such as the "Where energy is opportunity" at the Hungary GP at the weekend - it was on the inside of turn 1. The grass objects involved would need the faces adjusting but I don't know how to do that

Hope someone can help