Maybe I haven't clear enough: we're moving some companies to other database, for example, company 1 in database A should become company 51 in database B. Database A had many attachments which should be properly reattached in the database B. There is no problem with attachments, as they have unique names in the Attach folder, the problem is with links to these external files.
As far as I understand "Special company backup" exports current company attachment info. That's what I need to import into the database B, how can I do that import into the database B with proper renumbering of links and attachments registers:
e.g., if we had a record number (index) in database A equal to 1 (one), in the database B 1 must become the next available serial number, because 1 is already used in the database B by some something else.