Here's a manual I wrote for using phpMyAdmin. It covers the topics most important for your clients, such as inserting updating and deleting. It isn't meant for any phpMyAdmin or MySQL veterans, that's for sure. If you're looking for a document to pass along to your clients or sales people without overwhelming them with complexity, this is it. This link goes to an HTML version, but also has a PDF link that you can download and print. Database Administration using phpMyAdmin