Log-in to cPanel and find Softaculous.
Open Softaculous. A list of available applications will be listed.
Click on osCommerce in the e-Commerce section.
Click install application.
Configure the installation path. If you want osCommerce to be installed in the root directory of the domain and not in a sub directory, leave Path empty.
Select the osCommerce version you want to install. The newest version will be installed by default.
Enter your login details and click next
Softaculous is now ready to install osCommerce. Click submit to install.