A simple, plugin which will read your .zip file
1.Upload the auto_poster plugin to your wordpress plugin directory "wp-content/plugins/".
2.Then go to your wp-admin panel and under the plugins list activate the Auto Poster plugin.
3.After activation under the Settings menu you will see a new menu called "Auto Poster".
4.Make the .zip file of your files please don't add any folder in it. and follow the steps and your files will be upload on the site as a post.