I helped my friend do his Dreads, takes Freaking age's!!, u first have to section off all the hair in to lots off diff tails (locks) then u get a Steel comb (or strong one) and BACK COMB THE HELL OUTTA IT!!a u just sit and back comb the hair for hours.... while applying the dread wax....
I reckomend u just do it the old fashioned way of not washing hair and growing it out over a few years with elastic bands init... cause growing the hair first then doing it is freaking painful and boring as hell
But great end result :P