At the request of the Yankee brain trust, Reggie Jackson has been summoned to Oakland and he vows to help save Jason Giambi. Reggie is rushing to Giambi's side for a critical sitdown in the embattled Yankee's moment of need. "I can help Jason Giambi, and I'm gonna go there to help him," Reggie told The Post. "I'm certainly going to be there to support him and do whatever is necessary to get value from the asset. There's certainly some value there. It's gotta be done in some kind of positive fashion. I already have my directives, I know what I want to do. I'm going to do what I'm told and I'm going to do it fast. "His sensitivity is certainly something I have to be concerned about," Reggie said. "The degree of it is for me to determine and not talk about publicly."