1. Quoting Wildfire, "Humans in my Campaign World will not suffer the point penalty of Cross-Class skills. In other words humans will not pay double the skill points for skills that aren't allowed by their class.
Anyone who has a human in my Campaign right now that has taken cross-class skills please feel free to make the proper adjustments."
2. N'arth is predominantly populated by humans. Therefore, they get a +2 bonus to the following skills: Diplomacy, Disguise, and Gather Info. Its assumed that all of these skills get the bonus while dealing with humans on N'arth. A human trying to gather info amongst the Ogre's will not get that benefit. The disguise check applies if the human is trying to disguise himself as a human. Likewise diplomacy checks will only be granted the +2 when dealing with other humans.