DTM load default settings

I read on an earlier thread that you can use the variable GPK_LEVEL_SET_BYLEVELS = 1 to set all symbology to be level.  I have not had any success with this variable.  I'm using 08.11.07.229.  I have checked both the pattern lines dialog box and the DTM load dialog box and the symbology is still set to specific values.  Is there a way to have DTM tools by default load a standard .lpf file?