Off of overland, you need to use RESET.
Help level: 105
Syntax: reset list [start] [end]
Syntax: reset delete [number]
Syntax: reset add
Syntax: reset insert
Syntax: reset edit
Syntax: reset area (will "reset" your area based on the defined resets)
The order that resets are in is VERY important. You cannot equip
a mobile with an object before putting the mobile into a room first.
Likewise, you cannot put an object into a container until the container is
put into a room first.
This command is used to display, edit, delete, add and insert resets for
See also: INSTAZONE, RESETCMDS
As for overland... I'm not sure.