This module will allow you update your product information i.e. product name, product price, product model etc. from a spreadsheet like interface in one go. You can download this module from the Zen Cart website.
If you face any problems while implementing this module then please contact me and I will try my best to help you.
This page was down for a few days due to some misunderstandings however after amicably resolving those issues I have added this page back on once more for the open source community