This guide was created when the browser exploit was unreliable on anything higher than v5.5.1. Since that's no longer the case, this guide is probably useless for >99% of people.
This guide is for people who want to use the internet browser as their primary entrypoint because they don't want to pay for Haxchi. If you plan on buying a DS game and installing Haxchi or CBHC, then there is no reason to follow this guide. Haxchi users can go ahead and update...
Updating to 5.5.1 or 5.5.2 from lower versions