This is a how-to blog, describing the journey of applying a rollup 8 to dynamics ax 2009 with global GLS layer.
The reason for this blog's creation is that the upgrade guides omit the description of

• the mechanics of applying a rollup
• conflict resolution 
• uplifting the patched code to the outmost layer

The blog is intended as an illustration and insight and a comprehensive description. No warranties are provided or implied. Use procedures described here on your risk and ALWAYS test the upgraded code before rolling it our to production.

Let's roll!