modding your rock band 3 is surprisingly simple

(im recounting all the steps by memory. if you want to actually do this the first reddit thread on Google is what I used)

step one: get a clean flash drive and move your save game to it. then delete title update #5, making sure your auto downloads are off to make sure it doesn't haunt you from the grave.

step b: remove the flash drive from your Xbox and then download Nautilus (previously con tool 3.0 I think?). download the songs you want to use and then drag and drop them into Nautilus. 

letter number c: play game. have fun. do stuff. 

it was fun! I played a ton of songs with my dad just now :)