Put it simple, Carboload is "Unsulfur Blackstrap Molasses" (100% organic carbohydrates) plus some other staff. Just buy Unsulfur Blackstrap Molasses; better from sugar cane, it's cheaper (about $2.00 a pound). Don't get the "sulfured" one.
1. Just warm some water, mix the amount o molasses you want to use and apply this to you reservoir. Some people recommend 1 tbsp/gal (15 ml/gal); aprox 4ml/L. I use less, 2-3 ml/L.
2. I Highly recommend you to apply some micro organism, micorrhizae o bacteria, since you put your ladies into vegetative period, to avoid bad micro organisms infestation, and to help the symbiosis that helps the grow of the root system that helps the nutrients intake.
3. One alternative for Bud Blood is Phosphoload, expensive as Bud Blood which a haven't tried; but phosphoload is excellent. The active ingredient in these products is a bonsai hormone known as Butrazol that stops the vegatative grow and promotes bloom grow, but you should be very careful. I apply phosphoload (plus Piranha/Tarantula together, nothing else) only two times, the first and second week of blooming. After that I apply Big Bud for 2-4 times depending in the variety and the blooming period. Too much phosphoload develop "stones", but you don't get 'to see' the "crystals." Too much Big Bud extra-develops the female pistile which gives a no good looking. That is my experience.