how do i get the form to open a new window when I "add details"

We don't have a configuration option to open a new browser window from our widgets, currently.

That said, we don't change our widget javascript very often, so it's possible that you can keep a copy of our widgets.js file locally (you'll find the url in the <script> element you pasted into your page) and make some modifications to it that would open the result in a new window. I'm actually not sure how to open a new window as the result of submitting a form (which is what the "add details" button does).

I don't have a clear solution for you, but I can point you to some reference material about why opening a new window might not actually be the best thing for your users: http://www.sitepoint.com/article/bewa...

I hope that helps, even if it's not actually a solution.