import users - e-newsletter

Hi,

I can see an import user option for e-newsletter but note that this does not create a user account.

I have a multisite install (subdomain) and I need to bulk import site users (subscribers) to each subdomain, automatically creating both user account and assigning subscription to e-newsletter at the same time.

I also need to create a user account for the
main site too.

Please could you suggest the best way for me to do this.

Thanks in advance

Stef