Mistercorporate is a WordPress theme, so make sure you have already installed WordPress. If you haven’t yet, go to wordpress.org and you'll be able to download it free and follow WordPress installation instructions.
Download Mistercorporate from WordPress.org page and save it in your desktop.
You can install Mistercorporate in two different ways:
Via WordPress - Login in your WordPress site, go to Apparence, choose Add New, click on Upload Theme, choose mistercorporate.zip file, click on Open, click on Install Now and wait for installation message. When installation is finished, click on Activate button.
Via FTP (skip this step if you have already successfully installed your theme via WordPress)
Mistercorporate recommended two WordPress Repository plugin: MailChimp for WordPress and Contact Form 7. In your backend admin page, you can see recommended plugins. Follow the instruction and you are ready to use Mistercorporate.