The New NPC command opens up a new window containing options for creating random characters within a set of parameters you can specify.
The NPC Generator window enables you to create a random character based on the parameters you set here. The available parameters are:
Alignment - You can specify a specific alignment or a random selection from a sub-set (such as "any Good") or a random selection from all available alignments.
Race - You can specify a specific race or choose Any, Any Core or Any Humanoid to be randomly selected.
Gender - You can set the gender or have it randomly assigned.
Class - You can specify up to three classes for your NPC.