Paraliminal Tapes are based, in part, on NLP. In most cases, there is no need to undergo the "change process" multiple times.
Paraliminal Tapes are not based on affirmations. If they were, you would have to listen to them again and again.
As far a PhotoReading, you would no doubt gain more knowledge by PhotoReading different books, but when you want to "burn in" the process, then you can PhotoRead the same book again and again. PhotoReading 5-10 books aday is more like batting practice.