The advanced templates install to your webspace, usually into a folder named something like T1234 or some other four digit number Look around in your file manager, it goes to /public by default but you can specific what folder it ends up in when you install the template.
Note that the files are there but the change would need to be done in coding or with a valid site builder, like Dreamweaver for example. Uunfortunately the tools we have, Easy Site Wizard for example, cannot be used with the advanced templates, only the standard templates already installed with them.
