1) Download the theme you like from our
theme download section (in your case, download
Oceandreams)
2) Once the download is finished, unzip all the files from the package (preserving the folder structure within it) to a temporary folder on your local PC (e.g. to your desktop)
3) Connect to your webserver using your FTP application (in case you have none, there are several free ones available, e.g. SmartFTP)
4) Upload all theme files to the themes folder within your coppermine folder on your webserver (example: if the local files are at C:\Dokumente und Einstellungen\YourUserName\Desktop\oceandreams\, then upload the "oceandreams" folder from your desktop to /your_webserver_root/your_coppermine_folder/themes/ that represents
http://yoursite.tld/your_coppermine_folder/themes/)
5) If the upload succeeded, check everything for yourself first by adding
theme=oceandreams to the URL in your browser's address bar, e.g.
http://yoursite.tld/your_coppermine_folder/index.php?theme=oceandreams This means that the current default theme is being overridden just for you temporarily. If anything goes wrong, you can savely going back by entereing a theme name that doesn't exist, e.g.
http://yoursite.tld/your_coppermine_folder/index.php?theme=xxx6) If everything works as expected, set the new theme as default theme for everyone: go to coppermine's config and chose oceandreams from the dropdown list, save the settings and you're done.
Joachim
P.S. In the future, please use a better subject line that actually summarizes your question - if everybody posted questions with subjects like yours, all thread subjects would look the same. You shouldn't be using all uppercase letters - on forums, this is being considered as shouting.