You can set your D700 to bracket automatically with the Fn button: press the button and use the wheels to select the sort of bracketing you want (0, +1, +2 or -1, 0, +1 for example) and the number of bracketed shots (up to 9, -4 to +1EV) and the EV interval, from .3 to 1EV between shots.
For the merging, CS5 can, but many people seem to favour Photomatix (I don't like its standard rendition), and there is also Picturenaut, which is bothe excellent and donation-ware.
Olivier Rychner __________________________________________ Jetez un oeil à ma galerie if you feel like it! And it's a bit void as of now, but I also have a Nikonians blog
Auta i lomë! And my Nikon's only awaiting daylight...