If you possess sufficient building skill and would like to apply it on Saybrook's Planet, this is the place to get you the tools to do so.
If you want to make a Creator application, you need to register on these forums and create a new thread here in the "Staff Applications" section. Make sure your ingame name is in the title! After that, copy the form provided in this link into your thread (highlighted in pink) and answer the questions. Requires at least Starter X of any class and two weeks of activity.