To install the Designer contribution for OSCommerce, follow these instructions:
Before uploading any files or making any changes, please make a backup copy of both your database and your files.
Please download the OSCommerce installation package
Within the installation package, find the file: designer.sql
Execute this file either from the mySQL command line or via phpMyAdmin.
If you have a clean install of osCommerce v2.3.1 then copy the contents of "upload" directory of this archive to your store folder with overwriting of existing files and installation will be complete.
OR
If you have already installed other contributions and/or your osCommerce version is different from 2.3.1 then we recommend that you make the edits manually and follow these instructions.