Excitableboy,
If you are still looking for help, we will be glad to try.
In BeerSmith, at the top to the far right, next to the <Help> icon, is the <Options> icon.
In the <Options> dialogue box, select the Units tab. In the Units dialogue box, the second entry down is Grains/Extract. The Units dialogue box will allow you to enter the units you wish to use for each commodity and just to the right you may select the increment that you wish for you additions.
As for the Apple Juice, you can enter it as a Grain/Extract. Along the left side of the BeerSmith screen, you will see a directory window of all of your files and BeerSmiths database files. Just under Calendar View is Grains/Extract database. This is the table of all your fermentables. On the menu bar, select <Insert> and from the drop down box select Grains/Extract. This will open a dialogue box that will allow you to enter all of the data about the Apple Juice. I would enter it as an Adjunct. This is also where you can set the price and if you wish, your inventory level. Once done, it will always be available as an ingrediant when building a recipe.
We can't help you with the details about Apple Juice as we do not have that information. Perhaps by us re activating this thread, some other user will be able to help you with that information.
We hope this helps get you going in a better way.
Preston