11i Supplier Conversion and Supplier Bank Accounts

Is it possible to convert supplier bank accounts as part of the 11i conversion?  Should this occur as a separate step after the actual supplier conversion has occured or can the supplier setup and supplier bank account setup all happen at one time?  Is there a separate API for this conversion?  Would a dataloader be a better approach for loading the supplier bank accounts?  (roughly 5000 suppliers)

any supporting documentation would be helpful.