Submit form to be able to download thereafter, integrate with MailChimp?

I have a couple free downloads I offer from my website. I want to create a simple form (name and email only) >> have the data flow into MailChimp >> then return an email to them (ensuring a valid email) that contains a link to download the file.

The mailchimp integration is working fine in the "Keep in Touch" form, which just enters their name in the mailchimp database.

I've made a bit of a kludge to get this working. I've got another form called "File Download" and (a) I can't figure out how to generate an email to the user from within Gravity, so I just have the file open up once they click the submit button. There's no email validation this way, since they can enter anything and once they click submit, the file is there, and (b) that form doesn't link to MailChimp, which would be nice, but optional. I can always manually upload later.

Not sure if MailChimp allows mutliple welcome messages.... will check.

I think that will work. Have to set up interest groups to have multiple welcome messages. But it should work. Not to start another thread, but I have the basic email sign up form in my footer, which appears on the same page as the download the file form. both forms simply have email and first and last names. When the user uses the tab key to navigate, he enters his email in the download form and then drops to the bottom of the page to the first name field in the email signup form in the footer. Is there some way to manage tab order with multiple forms on one page?

Thanks Rob. I see the page where it says I CAN do this, it just doesn't give me any information as to HOW. Can you show me an example? I'm guessing it's probably pretty simple, like tabindex=1,2,3 or something like that. So again, I have two forms on one page (one on the page itself and the other in a text widget in the footer. When a user enters their email (the first field in the form on the page) and hits [tab key] they go to the First Name field in the form on the footer.