Add more user fields/columns to Batch Create

OK, this is a combination of 2 questions:

I have installed a multisite. I would like to add some custom fields to the users (ie company) so that we can identify groups of users under one site. I know that there are some plugins to add extra fields to the username signup/wp database.

However, we also would like to create multiple sites, and add pre-populate them with user info. Batch Create seems to be the easiest way to do this.

So my question is 2-fold. Are we able to add more fields to Batch Create? And if this can be done, is there a particular plugin that you recommend for adding the extra fields in the database?