2) To my knowledge, this can only be done via events (command #44) or by setting the vehicle value for an NPC.
3) The steal formula is at C2/399E. It's the same formula for all possible kind of steals. By changing the value at C2/39DC, you can have a lower or higher rare drop chance but the addition with the common value will always be 100% (like 1/16 with 15/16).
3) The steal formula is at C2/399E. It's the same formula for all possible kind of steals. By changing the value at C2/39DC, you can have a lower or higher rare drop chance but the addition with the common value will always be 100% (like 1/16 with 15/16).