Do you use a windows machine? If so then you should not need to use winzip for the zip files, this functionality should be build into the OS.
There does not seem to be any problem with the templates that you posted. I see in them the exact same thing that I see in mine. On the main template all of the code is editable, there is an area in the head section that appears greyed out because it is an IE conditional comment. In DW all html comments show up as grey. This code is editable withing the template though. As for the content page most of the code is not editable except for the code that is inside of the editable regions. This is because the content template is derived from the main template.
Is there any specific part of the main template or any of the editable regions in the content template that you cannot modify? If so please be specific so we can look into this with you. In my testing all portions of the main template are editable.