Packing List creation is a key factor for exports. Multiple sales orders or invoices created with multiple sales orders can be used to generate packing lists. Options needed to select box numbers, box size and items in each boxes with net and gross weights. Also each item in invoice should also show the relevant sales order reference for the client's ease. A sales order based grouping would be sufficient. I really wish to go for Zoho, but these things are really important for my business and waiting for you to implement these.