Displays an ATI template using the current parameters.

<sTemplateName>: the name of the template loaded using ATI_LoadTemplates.
<tRectangle>: a table containing four floats that define the ATI rectangle: x, y, w, h. Those are normalized screen coordinates from the bottom left corner (eg {0, 0, w, h} is bottom left and {1, 1, w, h} is top right)
<bVisibility>: 0 = invisible, 1 = visible. This does not apply to the text displayed. Perhaps to the rectangle. Tests needed. -SunTzu