Music might help with the boredom part. I don't use music during the actual flip-flip-flip of PhotoReading, but during activation appropriate music can assist.
One thing to consider is dramatically decreasing the amount of time spent in any one activation session. For example, instead of 20 minutes, try 15 or 10.. maybe even 5. Another would be multiple passes, making your FIRST pass absolutely nothing but superreading no matter what. You can come back and dip in pass two.
One thing Paul recommends in the home study course is to spend five to ten minutes right after PhotoReading to generate curiosity by looking at the book. Either open it randomly, or go to the index or table of contents and spend a few minutes with something you really do want to know about. This generates a hightened state of curiosity. It's easy to read things you're curious about. It's hard to even pick up a book that bores you.
In high school, I won the "oscar" award for being the messiest boy in the senior class. I find that if a book lands in the Null Zone under my bed, it means that my Other Than Consious mind is telling me that the book, like my bed, is something that WILL put me to sleep. The last book to do this on me was "Real Magic" by Wayne Dyer. I borrowed the tape series from the library. Got about three tapes into it and realized that even though I enjoy backgammon, listening to the tapes while playing backgammon was making backgammon boring!
The difference between this is, of course, that you're in college and can't afford just idgaf the text. Hopefully, you can find ways to make biology exciting.