Polyphasic Sleep, Vinci Sleep, Staying Awake for 22 Hours at a Time?

So I'm trying to start polyphasic sleep which is where instead of sleeping for 8 hours at a time you take 20 minute naps ever 4 hours adding up to just 2 hours a day of sleep.

I'm having a really hard time getting adjusted to this, I've over slept majorly twice now and I really need some advice staying awake and fighting the sandman!

Thanks so much for all your help.