No, once you have created your site, you cannot change the URL itself. You can change the site title via that widget on your page or in the Search Engine Optimization (SEO) settings in the admin control panel (look in Settings-->Global Settings). You cannot, though, change whatever you initially entered as your site URL.
No, the myPages service is intended for personal websites including those of research groups, projects, etc. It is not the proper platform for any official UNH department. If your department needs a website, please contact the web support team to find out the right options for you.
Yes, anyone at UNH can have multiple myPages sites. We will be putting in a limit on how many individuals can setup on their own, but if there's a need for more, you can contact the UNH IT Service Desk for assistance in going beyond that.
No, the OpenScholar framework is designed to allow users to create websites without having to do HTML or other coding. You use a set of tools and apps to enter content within the myPages service itself. You cannot compose a site elsewhere and then upload it for hosting. We are looking a options to allow linking to individual HTML files so that is someone has some raw data or information to share in HTML format, you can do that. Currently, you cannot even upload an HTML file within the tool.