Unfortunately we don't have any experience or feedback from customers with a MDS (multiple displacement System). Maybe someone else will reply that does.
If you do happen to try it we would love to hear how it turns out. Maybe you could try it out on your 2006 5.7L & if it doesn't work you can put it on a different vehicle? The D-7 Hydrogen Kit is the right one, you don't say what make & model so I am not sure about computer modification.