This is now the fourth Yahoo! Store tutorial that I have written for everyone to get some kind of know how from! This tutorial will show you how to but a custom field in with the price and part number. You could use if for things like; manufacturers part number, item status or even the release date and more! This is only for the Yahoo! Store Editor V3. You also must know how to edit RTML for this tutorial. Login into your store manager >> Catalog Manager>> Manage Your Tables>> Default-Tables Now the first thing that we will have to…