from the manual about vec_to_screen
Quote:
Converts the XYZ coordinates of the given vector to screen coordinates. After the instruction, the X and Y coordinates of the vector contain the XY screen position and the Z coordinate contains the distance to the screen plane.
that's why i thought i could move the entity on the screen like a panel.
ok after some more edits everything works fine now 
there's only the problem with the panel left, but i think i will just rework the interface..
thanks for your help tompo! time to rate you 
