I think you're right. Also I don't think it needs to be called a "disclaimer" either. How about:

Advanced Customization

Introduction

This area is for advanced customization, and allows you to directly modify the code for your journal's style, or create new styles. Are you looking for the main customization area, which can help you customize your journal's style without modifying the code directly?

Documentation

Here are some useful resources to help you understand Dreamwidth's S2 system before you get started tweaking or programming it:

• Dreamwidth development wiki page on Styles
• S2 Documentation
• Public Layers

Advanced Options

• Your Layers -- create/manage your layers
• Your Styles -- create/manage your styles