The "Override item ID" overrides the ItemID uddeIM uses for its links and not teh ItemId that another program uses for uddeIM.
It makes sense to use this function when you have created more than one menu link for uddeIM, so you might want uddeIM to use a different Id from the ItemId uddeIM determines automatically.
uddeIM & uddePF Development
CB Language Workgroup
CB 3rd Party Developer