First extract the zip file you downloaded. Then go into the folder that contains the file contents you just unzipped and find the ZIP file named WARZONE. That is the file you will upload (Yes, a zip file within the zip file

). To upload it go to Admin then Themes and Layout and at the bottom of the Themes and Layout page you will see a
Install a New Theme Browse button. Just upload the WARZONE zip file you extracted. thats it.
And if your using tinyportal then the file named tp_index.template.php must be renamed to index.template.php and uploaded to replace the current one.
i think thats right.