The old packaging system based in second life native objects properties you needed a land to rezz the box on the ground and open the contents you purchased. Sometimes you didn't have land permissions to rezz so you needed to go to a sandbox.
With the new unpacking system you don't need to drop your package on the ground. When you purchase you receive a item you can WEAR. Once you wear the item and ask you permissions to unpack, the unpacking system makes a folder with the same name than item in your inventory and put all the content inside, it's that easy.
