Adding a personal grain pack using Add-on

Anyone know if there a way to add your own personal grain pack, one not in the Beersmith online grain pack data bases, using the add-on feature?  Or at least access the ingredients to add to a recipe? 
I've tried copy/paste and add grain button but it always brings up the "installed" grain packs..
I copied the .bsmx grain pack file into the Updates directory where the Beersmith2 installed grain packs are stored, but they are not being picked up when opening BS2.
Thanks in advance.

Received an answer to my query from a member of another borg...  He states:

"What I did is open the file in BeerSmith. Then open the grain ingredients tab. After that, just select the MB/Coopers ingredients and paste them into your grains tab. That should do it. "


Worked like a charm... Problem solved...