juicing help for newbie

[stocktrader]

I am planning on doing a juice fast that will last anywhere from 7 to 30 days. I have a few questions:

1. Do I need to take in fiber? I assume there won't be much since it is all juice. Should I take a fiber supplement or work in some type of high-fiber food as a side item?
2. Do I need to take in protein? I should point out that I don't plan on having any protein-rich items like nuts or anything. I plan on eating primary greens and berries and fruit and stuff. I have thought about doing a modified juice fast by adding a portion of grilled chicken every 2 days in order to get protein. Thoughts?
3. Do I need to take a multivitamin while juicing? It seems that if I am taking in tons of fruits and vegetable that a multivitamin would be completely un-needed. Would a multivitamin actually pose a risk of any kind?
4. How many calories should I be taking in per day? The consensus on calorie intake is that it is safe to take in 500 calories per day less than what you need, but anything more than that is not recommended. If I am creating 200 calorie recipes, would eating 3 or 4 per day be enough?
5. Is it unsafe to lose too much weight too fast (this a variation of the above question)? Many juicing people talk about how they lose 20 pounds in 20 days.
6. Can people recommend bland foods for me to juice? I am a very picky eater.