Configuring Microstation to load a MDL app

I have an MDL app I would like to load when I start Microstation.  I found an older instruction sheet for the procedure, but the latest build of MS has a slightly different file structure.  For example, on the first directory shown, "icons" is no longer in the "mdlapps" folder.  The second directory is still the same.

So, I'm trying to figure out where to copy the .dll file to as shown below.

  • Copy: 

    • C:\SignCAD\Ustn\signcaddllV8.dll  to  C:\Program Files (x86)\Bentley\PowerGEOPAK V8i\PowerGEOPAK\mdlapps\icons 

  • And: 

    • C:\SignCAD\Ustn\SignCADV8i.cfg  to  C:\Program Files (x86)\Bentley\PowerGEOPAK V8i\PowerGEOPAK\config\appl