How do i set the world space in image modeler? Y is down, but as soon as all my calibration points are set, it screws the world space up, and the define world space tool keeps locking up.

Hello,
 
  Once placed the worldspace (using the tool) did you press the "apply" button ?
If not the worldspace is not set, and further calibration sets a default worldspace ...
 
Hope it helps,
 
Stef