(A) now 0 is black as black gets but i didn't go that extreme, for a few reasons.. the black'est - black maynot be where I sampled, it' a mere guide ok - unless you concentrate on the dark area's you don't notice that much detail in them, anyway so I used 22 in this example and 255 is as white as white gets , but i didn't go that extreme, either, I used 240 (to compensate for the sharp lights (lensflare looking things) that reflect from the car, to the camera) one other rason is so you can use the next step.. (b) the way I moved the curves, is slightly different. because I move the end points so that the curves, don't curve. (i thought i'd give a tricky way a go) unike last time you can't just type numbers in to match the out-put you have to keep an eye on the info.