Alright, this one requires a bit of explanation, but essentially, if you put the CON files for these songs in the same place as you would other customs, you can play these online. The general hypothesis (and by that I mean Nick told me and I think Pikminguts insinuated it) is that Title Update 5 checks for the tempo maps of RB1 songs, and that's its anti-piracy measure. Strangely, the three songs that don't import are included in the group of songs that are good to go.
I have to wonder if we can then get custom made RB3 versions of these songs to work so long as the tempo map is unaltered. That seems to be how that one custom of Cum On Feel The Noize was playable: grafting an RB1 tempo map onto it. Of course, the chart looked off-beat at all times because of that, but otherwise it would be worth a shot.
Of course, when it comes to customs, I have many other things on my plate right now (especially this week, wink wink), so it's the kind of thing to spend a Saturday afternoon on as an experiment and nothing more.
Anyway, we did two of the three songs, so stick around for more trivia on these weird FBFCs.
Guitar: Nick
/ bongofdestinysh
Bass: Zahed
/ galoyarr
Vocals: Connor
/ weregonnaneeda
Drums: Tyler
/ doofiestdoofz