public virtual void MapPlayerToInputs(
	int PlayerNumber,
	SpriteBase Target
)

This is the basic means by which the input device, as customized for a particular player, is associated with a sprite, so that the input will control the sprite for that player. In many cases, it may be easier to use the sprite definition's version of MapPlayerToInputs(Int32) so that this doesn't have to be repeated on every map, however in a multi-player game, it may be easier or necessary to distinguish the individual players on each map if each player uses the same sprite definition.