Dear Ahmed,
1. I didn't understand remittance transfer. From commodity Trading i do understand Commodity Risk management. Can you please explain this in detail.
2. In customizing, for cross application, Master data synchronization, you can always automate the process of customer/Vendor master account and BP creation.
3.Yes, Currencies can maintained manually or through live feeds. Thats a trivial task.
Regards,
Manish