I think you mean Superread and Dip. Your questions are do important. You need to have clear questions of what you want to know and then dip if you think you found the answer to the question. That means dip a lot. Until you found the answer. If you haven't formed questions you'll have a hard time deciding where to dip.
With rapid reading you read from front to back and this is closest to regular reading. Slower over new stuff, faster over everything you already know and understand and moderate speeds over stuff that you may not know but realise isn't that important.
Alex
