I was thinking about the cube and how it can be used and think I came up with a new idea (please correct me if someone else has already thought of this)
If you know the girl quite well, using the cube might appear redundant to her cos you might know all that stuff that the technique usually tells you already. e.g. you know that she is close to her family, has a small circle of friends, warm, creative etc.
But what about if you work it backwards....work through the routine with her and tell her to imagine all of the images. So in her mind she has created a landscape which includes the cube, the ladder, flowers, horse and storm.....but to keep the details of the landscape to herself
Using the info you already know about her you could make an attempt at guessing the characteristics of the landscape....Making it seem like you are psychic..
For example if you know that she is creative and a free thinker you could say:
"I'm getting a feeling that Cube is in the air, above the level of the horizon"
Obviously the more you get it right the more amazing it seems. (Obviously it could opposite effect if you get the descriptions wrong!) But if done right, it could meet with positive results!
I've not tried this before so not sure if it would work, so it would be great to hear people thoughts on this!