In this wiki, you'll find everything you need to properly hack the Rock Band titles. This wiki covers mostly Rock Band 3, since it is the latest Rock Band version on a Nintendo console, and some network features still work. However, this wiki also covers a few things to help you with Rock Band 2, and Rock Band: The Beatles.
Start here before doing anything! These four steps will help you be able to add any customs to the Wii, Wii Family Edition, Wii Mode on the Wii U, or Dolphin.
If you want to author your own customs, or refine existing ones, these guides will give you the knowledge and tools you need to be able to become a Rock Band hacking pro!
Official Rock Band DLC by Generation
Whether you bought it legitimately or downloaded with the Rock Band DLC Downloaders, you might want to know what is in each APP or BIN. Check your generations against these handy tables to find out which songs you want to add (or omit)!
These pages will aid in some problems that you have. Not everything is covered here, but you should find some of the most useful info.