How to Install Template / Theme ?
1. Download a template file (zip or rar) and extract the file.
2. Login to Blogger.com.
3. On the Dashboard, click Design → Edit HTML
4. Before you upload the template, dont forget to backup your old template.
5. Browse and upload the new template.
6. If u see a notice "Warning : Your new template..." Click "Keep widget".
7. Wait until a new template uploaded & enjoy your new blog look.