You're welcome to add extra addresses in the footer if you'd like! There are a couple of options for you:
1. If you're building your templates in the Assets section of your account, you have access to the footer code and you can add it in that way if you're comfortable with code or have a designer that can do it for you.
2. If you're not code-savvy, our design team would be happy to put something together for you. You can reach out to them at http://myemma.com/services to get a quote for a custom template.
3. Depending on what information you need to add, you can add additional information into the address field of the account settings. You can even add line breaks into each individual line by adding <br> between the lines. Using this, you could possible add in an entire address in the Address 1 field (ending with another BREAK)... then add in the 2nd address starting with the "Address 2" line.
That last one is a bit of a work-around, but it could be a free option that doesn't involve too much code.