Our teaching organization is switching to Drupal and I'm importing all 1500 members using the CSV import module- that part is easy- what I can't figure out is how to create a transaction for large numbers of these users simultaneously, and how to avoid having to do it for each account one at a time.

I want to add an already paid membership fee (using recurring payments and schedules-this I know how to do) to each account- in other words, the same product ID to every account, but hopefully not have to go to the ecommerce "create transaction screen" and do it one at a time.

Is there any way to create transactions for many users simultaneously?

Many thanks!