Blaise nodded.  "Testing will be tricky," he said, "but I have an old book that goes into how Pepperup and Amortentia were developed, so we can reverse engineer a little from that."  He looked at Draco and shook his head.  "You're a fool, you know," he said.  "You're trying to give your little bird the key to her cage and, given what you and your father were up to, she'll fly away from you so fast you'll be lucky to ever catch a glimpse of her again."