Mass Update Payment Terms (customers)

Hi,

Is it possible for the end-user (receivables / credit / collections analysts) to mass udpate a certain number of customers from a pament term to another?

for example: on a particular OU we have about 10,000 customers, and we want to update 5,000 of these from payment term "net 30" to "net 60"

we also want to update all open orders, but not open invoices, as we've already send those out.

i know we can script it, but we don't really want to go that route... but rather empower the users more. However, we don't want to have them do it manually for each...

Thanks,