what is the best way to receive product from an internal supplier.

We are an mushroom grower who operate 4 different farms in which all product from these various farms are received at production plant central to the locations of the various farms.

We categorize our product by Type > Size > Grade.

I would like to have a screen that allows me to quickly add each item as we handle over 2 million pounds a week. 

I have played around with the current 'incoming shipments' mod, however I am not a fan of how you must open another window in order to add line items. 

I do however prefer the purchase order screen which allows me to add items right on the line (on the same form).

Is it possible to have the product entry on the 'incoming shipments' form act like the product entry on the 'purchase order' form