You should follow the protocol in the PPH. I understand you trying to come up with a way to mask the horrible taste, but I don't think that this is going to work. You have to drink the N very quickly, because it takes effect immediately. There are reports of people who fell asleep before they finished drinking it, because they were drinking it too slowly. It would be very difficult for you to gulp down a liter of juice in under a minute. You would most likely fall asleep long before you finished it. Also drinking that much liquid so quickly would increase your vomiting risk. Unfortunately the N is so foul tasting, I don't think anything will mask the taste completely.