Q.1. Can I use my own scheme for ID numbers?
A. Probably not. The FHS Name record ID numbers are simply a convenient means for uniquely identifying each record. You should not try to attach any special meaning to them by entering name records in an order that would cause the ID numbers to have some "relational" significance. The program automatically generates relationship identifiers that conform to the most commonly used schemes, including lineage or "ahnentafel" numbers for ancestors and "bloodlines" for descendants (which are essentially the same as the "Henry" system for denoting descendants) so there is really no need to make the ID numbers serve that purpose.