Importing Users from a file

[MOGmartin]

Hi Folks,

Im looking to import user accounts from a database that I have on my opt in mail list from an old site (that wasnt a forum).

The details I have for them:

username
email address
first name
second name
address etc. etc.

1) is it possible to auto-import these details
2) what would happen with creating passwords for them, could I set it to request that they change/create a password on their first logins?

thanks!

MOGmartin