Fender rolling:
http://forums.evolutionm.net/showthread.php?t=209244
There's a couple ways to do it. This shows how the lip inside the fender is rolled in on itself. Being really agressive with the roller will let you bulge the fenders a little, but that's a risky proposition.
I don't think the lug nuts will fit. Not 100%, but I can't recall any of the Nissans I've worked on having the same style of lug nuts as us.