go to C3 customs creators site and read the FAQ on how. basically, have a real disc (not madcats), get a flash drive (for xbox360 -so format it) download C3 program from site. find songs on the site (they are ok'ed from harmonicx and you can create your own!!!! yay more raps and disco [btw disco is not novelty or others for genre - people who do that tare maroons ]), or there are packs out there (youtube it and then find the way) can't give you direct links (mods obviously). tite update 4 (loaded form the c3 program on the RB tab) with the c3 program and then load that flash drive with your songs. 2 things: 1. copy you band save file and programs, and save!!!! (you will lose it when switching from customs and from 360 online play - don't even get me started on the PS# it crashes all the time and you have to hunt the 1 songs that di dit. totally not work it). personally, I DO NOT play online so no problem there and have my box disconected (why? seriously I use it as a real music karaoke machine - the RB4 mics are pretty good but do a ton of research), save your file like every time you play canuse you will F up and there ya go. 2. When creating packs do them under 300 songs (it makes it hard sad and doinks up) and you have a limit of like 2995 songs. OR you can get a jtaged or RGB (something) physically modded 360 (like 100 on ebay) and then can run Rock band 3 Delux a custom program, that has a song limit of like 36000 songs, and other goodies. from what I've seen it is awesome. Seriously, now if only we could get the same thing with dance central!!! That thing could have been the greatest if they calibrated the lens for apartments, upped the resolution, and made it not houses with 30 x 25 ft play space (who the F has that??).just dance can lick my Balls its not dancing it pantomining, and lame. thnk south park dance episode.