Use a piece of card about the size of a business card and push from the top down. So what you've alread seen becomes covered by the card as you go down the page.
You are not tryting to read only notice what you see at this pace. You'll pick up a word here and there. These become cues for dipping later.
If you feel rushed take a book. Open it anywhere, turn it upside down and practice doe 20 seconds on ten pages. Stop for a breather turn the book right side up and do it again for 40 seconds and for 20 pages. Now when you do superreading and dipping at about 15 seconds per page you've slowed down considerably.
On top of all that. You're only up to disk 2, Go easy on yourself. If doesn't always feel comfortable but it becomes something you get the hang of.
Alex