Is it possible to set up a default payment method on the supplier site other than "check"? How?

If system cannot fetch the payment method from the supplier or from payment method defaulting rules, it defaults 'Check'.

To default payment method based on primary flag in supplier detail, set "Override defaulting rules when payee default method set" flag in Manage Disbursement Options. Navigation to setup this is:

Setup and Maintenance
Manage Disbursement System Options
Check "Override defaulting rules when payee default method set"
Save

After this payment method will default based on primary payment method in supplier.

*We would like the default payment method be: "national transaction" instead of Check. Is it done the above way or how can it be achieved?