Creating a Polyphasic sleep schedule

I'm considering going onto a polyphasic sleep schedule but my schedule doesn't seem to allow it. I've been looking at various sleep patterns on wikipedia
But none of them seem to allow it. Currently I wake up for school at 7 AM and get home at about 4:20PM.
That's a 9 hour gap.
A dymaxion sleep schedule seems to fit my routine best although that needs 6 hours between naps.Could I push all of the naps into my home time and then rearrange the spacing between them? Or possibly remove the midday nap altogether and increase the time of the other naps?
I've read that these schedules have to be very strict to work, so I don't want to commit myself unless I know the routine will work.
Any suggestions?

I'm not entirely sure but I believe the basis of most forms of bi-phasic sleep is that you have naps of atleast 45 min length around 6 after walking up. At this time the body goes into a natural dip, in many hot countries it is culture to take a siesta around midday. While taking naps is very good, if they are to replace your main sleep they must be atleast 45 mins long for your body to get all the good effects.
So seeing as you are restricted to a strict schedule I wouldn't choose any radical new sleep patterns, how about you try have a nap after school and wake up to dinner. It is important that you don't nap after dinner or right before your night sleep.
While this really can't be called polyphasic sleep as you aren't changing much you don't seem to have much options.
Why do you wan't to change your sleep pattern anyways?

I don't have allot of time to myself so I could really do with the extra time and I've been looking into lucid dreaming and I read that these sorts of sleep patterns increase your chances of lucid dreaming since you enter REM sleep so soon after closing your eyes.

Well I'll tell you something I've observed over the last few months. You can become a master lucid dreamer, no matter what technique. I used to wan't time to do stuff when I got home but soon after I started having Lucid Dreams I realised that cutting hours off your sleep is not worth it one bit. Leave it unchanged, sleep 8 hours a day and try not to think that you are wasting time sleeping but rather using the time wisely. After a few months of consistently trying DEILD I believe I have now mastered the technique, the problem is that if I don't sleep long enough I can't do DEILD.
So while it may seem like changing your sleeping pattern is an answer it really won't make a difference, your chances will be just as high if you practise LDing right.

Even if I stick to my current sleeping routine then I will still be trying to lucid dream ( So you know i'll be sticking around! ).
But in the mean time I would at least like to try to find a polyphasic routine because the benefits are just so enticing!

If you could critique and/or adjust this timetable then I would be very grateful. It's one I've devised myself by adapting the everyman plan.

The numbers represent hours of the day and each / is a sleeping hour

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