In my opinion, you don't need 7 months to do the YBCR program/ Your baby should be able to learn the words by watching the DVDs once a day for a month. Babies are supposed to be able to learn words after 15-20 times of seeing the words. The more you show them words, the faster they learn them and require less exposure to master words. So in the beginning, you may show the video for a month, but if your baby is losing interest and acting bored, by all means, move on. I think 5 months is more realistic.
If you want to teach your baby to read quickly, without a big time commitment then teach with flash cards. It takes seconds to show a set of cards and you can do it after a diaper change or during a meal. You can show between 5 and 20 words per set a few times a day and for a week and then keep switching your sets. It is easy, fast and fun. You can make the flash cards yourself or you can purchase ready made flash cards.
To learn more about flash cards check this out
http://www.intellbaby.com/flash_cards_for_babies.html.