clephro,
you can download the wordpress zip for the version you installed, extract the contents, and reupload wp-content and everything inside it. If you are using a theme that you obtained from somewhere else you will need to go get it again, and re-upload it as well. The same applies to plugins you might have previously installed.
You DO NOT need to create a new installation in order to upload files.
If you would like, I will be happy to upload the necessary files for you, you can email me at whoo AT village-idiot DOT org .. please understand that in order for me to do so I would need your ftp info, login and password