One tip that I found was overlooked on the Rock Band Creator site was how to load a color map. In Reaper (the MIDI charting software), the default colors of the MIDI notes make no sense to someone who’s familiar with the Rock Band video game. The drum pads and fret buttons on the controllers are bright colors for a reason. If the colors in your MIDI editing window don’t make sense, go up to “File > Load color map from file…” It should default you to the Reaper > Data > color_maps folder but if not, you’ll have to find it. Once you’re there, pick which map you need for the part you’re working on (guitar, drums, or vocals) and hit enter (or return on a Mac). That’s it. You’ll have to repeat those steps for each MIDI track but now you’ll actually be able to see which buttons you’re charting without having to look at the key on the left.