Usage: replace_program("pathtoinheritedfile") You can use this in rooms that inherit a common base file and have NO functions other than setup() defined. This allows the driver to re-use the program code from "pathtoinheritedfile" rather than loading another copy into memory. example inherit "/std/outside.c"; void setup() { set_long("blahdy blah blah\n"); add_clone(CHARS+"npc",3); add_exit("south",HELL,"plain"); replace_program("/std/outside"); }