You can install WordPress directly through your cPanel interface.
1. After logging into cPanel (see instructions in the help files if you need help to do this)
Go to the Section "SOFTACULOUS APPS INSTALLER"
Be sure you in the correct Section.
2. Double Click on the ICON for the Installer
3. Click on the WordPress Box then on the next screen click on Install.
4. Just follow the prompts and WordPress will be installed on your site.
Remember to write down your login information.