I think it would be great to be able to open an existing template, modify it and be able to "save as" a new template name. I have a seperate template for each of my forums so that the forum name is in the header. This would make things a lot easier. Right now I upload a copy of an existing template renamed to the next available number and modify the vars_styles to reflect the new name, then I open it in the CP to modify the header.
Any takers?