Marking a large number of bank statement lines as reconciled or external

Hi

We have a large number of bank statement lines remaining unreconciled as they relate to transactions outside Oracle EBS.

There are four bank accounts and the daily bank statements have been uploaded to Oracle Cash Mangement for the last 12 months or so.

Most of the statement lines were reconcilied in Oracle but around 2,000 lines remain unreconciled due to the above reason.

We will not have any transacions outside Oracle in the future.

As one-off clean up excercise, is there a simple way of marking the above lines as renconciled?

Regards

Michael