The ms-dos application is not an ms-dos application. If your domain ends in .com the file will also end in .com but it is a text file and you can open it with Notepad or some other text editor.
As for not wanting to purchase Winzip you can still download it and use it in evaluation mode for 30 days.
You can read through the log and it will list every page and image that was accessed on your site. There are site analysis tools out there and some are free.