Install 4 contributions in a freshly installed unmodified oscommerce 2.3.1 store. Give us a list of exactly what you did to install each. This project is ready to go NOW!
Here is the list: Modular Front Page http://addons.oscommerce.com/info/7626
Monthly sales/tax report
http://addons.oscommerce.com/info/8078/v,23
Extra Pages Info Box with Admin http://addons.oscommerce.com/info/2021
CK Editor for osCommerce 2.3.1
http://addons.oscommerce.com/info/7650
