Just add them up on db/import/mob_avail.txt if you need to change their looks into character class sprite.
// Mob Availability and Alias Database
//
// Structure of Database:
// MobID,SpriteID{,Equipment}
//
// 01. MobID Mob ID to change.
// 02. SpriteID Mob ID which will be sent to the client instead of MobID.
// If 0, the mob becomes unavailable for use.
// 03. Equipment Item ID of pet equipment (must be available for pet counterpart, or this will cause problems).
//
// To disguise a mob as a player:
// MobID,SpriteID,Sex,Hair_Style,Hair_Color,Weapon,Shield,Head_Top,Head_Middle,Head_Bottom,Option,Dye_Color
//
// SpriteID is a job class value.
// Weapon and Shield uses Item ID, while Head uses View ID.
P.S. Yea you're right about the wrong section becuase this should be on Script Support.