Wow, you do have a lot of questions here qwnbee1. I'll see how many I can answer for you and the ones I can't, hopefully someone else will chime in for you.
what is baggying - baggying is a method of keeping the dry hair moisturized for extended periods of time. It really helps to restore moisture in very dry hair. The way to do it varies from person to person. The way I do it is apply a water-based moisturizer to my ends, seal with a natural oil and cover with a plastic cap and go to bed. Others simply baggy this way using a sandwich bag on their ponytail and simply go to bed with a satin cap on over it, or put a phony pony over it and wear throughout the day.
how do you use saa - Silk amino acid can be used many ways. It is simply protein and can added to shampoo, conditioners, relaxers, treatments to enhance your hair strengthening experience. You only need about 1/2 teaspoon added to each conditioning treatment or shampoo. I add about 2-3 tablespoons to my relaxer. You can also add 1-2 ounces of it to a bottle of poo or conditioner depending on the size.
is aloe vera a good water based moisturizer - I would call it a protein moisturizer because of the aloe barbedensis which is a medium to hardcore protein. Many mix it with rose water and/or distilled water and glycerin to get some level of moisture when using it.
does using megatek on the scalp soak in and make you sick - I've used MT on the scalp and I have never experienced getting any kind of ill feeling. It is a great product in my opinion.
when would i use porosity control to get the best results.. - Well I'd imagine that if your hair is chemically altered in any way that you would need porosity control. Hair that has been chemically altered (dyed, colored, bleached, permed, relaxed, and even hot tools) is in an alkaline state and therefore the pH is thrown off balance (i.e. it should be at a pH of 4.5 - 5.5 which is acidic). Most relaxers have a pH of 10 and up which is extremely alkaline and can cause the hair to become extremely dry, tangled, lack luster, dull, have raised cuticles, static, etc.
Chemically altered hair has a negative charge hence all the problems above with it and non-chemically altered hair has a positive charge meaning that the cuticles lie flatter thereby, reflecting healthy shiny hair that is easily managed. That is where porosity control comes in - to correct the damage we've done to it via these alterations.
Now porosity control conditioning should be done before a relaxer or chemical treatment to prepare the hair for the shock of what it will be going through and thereby, minimizing all the problems I indicated above. It can also be used after a chemical treatment as well. I use it quite often actually, I'd say about every 10 days or so but just for about a minute or two before I shampoo my hair. Some people leave it on longer, but to each his/her own. Some people even put a little of it in their deep conditioner for added slip. Try it out different ways to see which is better for your hair.
Boy I sure hoped this helped someone...
Just wanted to give you my praises Aggie.. You are so darn HELPFUL dont know what some of us would do without you!