Nap Extension for my little cat napper.

I'm reading the Baby Whisperer on and off and I really need my son to start napping longer than 45 mins per nap... he takes like 6-8 naps! Once in a while he will go for an hour and half up to two hours. He will be four months in a few weeks and I think it's time to start nap training for him. Don't get me wrong he's a great sleeper and will sleep through the night anywhere from 6-7hrs then I will feed him and he will go back to sleep for another few hours, which is usually a total of 11-12hrs. Tracy Hogg (Baby Whisperer) mentions for nap extensions to go into your babies room after about thirty mins of napping. When it looks like your baby is starting to come out of a deep sleep gently pat your little one until he or she seems relaxed again enough to pass out, it could take up to twenty mins. I'm hoping this works but I'm afraid it will just wake my baby up sooner. I'm going to test it out for a couple of days and I will post an update and let you all know if it works or not for us.