Customer Master Default to something other than 00000

Is it possible to default the Company (CO) in the P03013 to a different company?  It is my understanding, when creating an address book record, E1 automatically creates an 00000 company record, we have several acquisitions and would like the ability for the users to differentiate between their accounts and others.  For example, we would like to use company 200, which has already been setup in the P0010, however, when using the Zbatch upload it will not accept the company as 00200 but will default it in as 00000.