srgb vs adobe 1998

The photographer I admire, shoots only in black and white. And, I shoot only in Black and White too. And, of course, only in raw...however, what he get's in his raw shots is the most amazing depth and coarseness and reality looking photos...which I still want to capture too.

Thus, its' immaterial to me to shoot in Jpeg, as I don't use Jpeg. I shoot in raw on my M9 as it gives me the most latitude to improve upon...however, with all the above written, I am still not technical enough to understand whether I can change the setting to Adobe 1998 if that is my choice...and, if it is a choice, how do I do it?

I think I understood it has to be done in LR, if so, then where and how do I do it in LR?