Permissions to edit html and css files

I want to do some editing of the html and css files that work the /content/ and /shared/ pages on the piratebox.

First off, where are the files that are used for the site? Not the backup files, I dont want to mess those up.

Second, whats a command I could use in SSH to grant permissions to the folder and all subfolders and files? Rather than granting permissions per file...