does a noserider have to have a concave in the nose to noseride??? what about just a rolled bottom in the nose??? thanks guys!!!

Yeah, a rolled bottom and a belly under the nose work great for nose riding. Early 60’s style.

I’m not sure; so, this is in part a question. Can a noserider also have the step deck?

Stepdecks make good nose riders, because the board flattens out as you go to the nose. A flatted board nose rides better, at least in my book.