Id2:Int (read/write)
Real Id number, or 0. Some add-ons send their own objects, which may have different Id numbers, to Ufos to make them visible to players. This field is to support these add-ons. Currently, this field is used with PHost's wormholes, where it holds the real Id number of the wormhole, using the usual rules (even Id = entry, odd Id = exit).
