Well you cant prevent rotation by altering the clothes, but you CAN by altering the babyz file.
You need to prevent the stomach/knee/shoulder whatever bmps from rotating.
To do this you need to add
[No Texture Rotate]
To the babyz file. I tend to put it under
[force to female]
Now don't go doing this to all of your babyz as you must have the hexer's permission to do so!
But yes I thought it was interesting, it allows clothes like this:
I then figured out that the principles the same for non-rotating tattoos.