I used the sugar+yeast + 2lt method
I found using 3/4th cup of sugar worked better than the 1 cup of sugar stated in some of the other guides.
I used 1 tsp of yeast.
When mixing the yeast and sugar with the water. MAKE SURE, that the water isn't TOO hot i recommend using a warm water.
I filled the water up to the TOP white part of the 2lt (AFTER ripping off the "packaging" on the out side of it).
Shake it up well.
FOR CRAFTING THE CAP!!!
I warmed up something sharp ( siccosrs, screwdriver, knife,ect.....) Stabbed a hole in it and put one of those Bubble locks, (
http://www.beer-wine.com/product_info.asp?productID=186§ionID=2) on the top to regulate the air flow. I made the hole small enough to where the end would barely fit in there that way it would be very snug. You can use regular glue around the top to create a nice seal that way ur precious co2 only excapes one way.
It takes like 2 hours tops to see action i usually see mine start to bubble good within 30 mins.
KROGER sells yeast if u cant get any, any where else. They have super active yeast, im assuming that would work better than regular yeast but i haven't tried it yet.