Hi Patricio,
1. for attaching the documents please explore "notif_notes" table parameter.
2. for Sold-to Party and Support Team - use "notif_partners" with correct "type_par" and "func_par" field values in that table.
3. Currently I don't have access to SolMan or CRM system. But I am sure there is a BAPI to change the notification.
Regards.
Piyush R Sakharkar.