I am building a new site where I need to do the following:

1. Add custom fields to user registration form. (I think can be done with the profile module that comes with xoops 2.5)

2. Periodically Import a list of users from a csv file, register them and add to a specific group and send a mail to these users with a generate password link.

3. Periodically update existing user details using a csv file and add them to a new group.

4. Also send mails to specific groups periodically & iff possible sms the members using a sms gateway.

Can some one suggest a module/s for the same...