Login to the site you want to upload a template for, you'll know you are logged into the correct site when the sites name appears in big blue letters at the top left hand corner of the admin .
Hover over the design option and go to all templates:
On The Templates Page, click the upload template button:
Next, click the choose files button and select your UNZIPPED* folder using GOOGLE CHROME*, then hit upload.
That's it!
That's all there is to adding a new template or uploading your site.