Crafter's Guild Quest

You can start the Crafter's Guild quest by hailing MacGuyver in the Nexus, and collecting the necessary items.

The best two sources for the crafters guild quest info are on the Official EZ Server Wiki's Crafter's Guild Guide

There is also a fantastic visual guide put together (PDF format) by Reddwarf that can be downloaded here

Alternatively, you can purchase the Crafter's Guild flag for 8 EZ Credits.