shooting digital, nikon d70. system: dyna lite 1000 watt second pack and three heads. i have to shoot people and food and product with a super clean white background but am having trouble with bounce, white balance and fall off. i have exerimented with different set up including: 1)bounce head off white ceiling and use soft box/ umbrella for people subjects. 2) two heads pointed at white seamless at approx two stops higher than main subject light aimed at person. i find that i am either getting too much bounce and distorting hair or lighting on background is uneven or background is not stark white. i can achieve results by removing subject via photoshop background eraser and moving to new white document but i do not want to expend the effort. help please to learn a regular set up that i can use as a formula which always works. thanks.