Ok people, most imports are working really fine so far, but I've encountered a few problems I couldn't find solution yet.
Some of the problems I think I will figure out after I finish reading all the mini-
tutorials I've found on Fof and ScoreHero forums, but one situation I couldn't find anything about and is really bothering me: 3 custom songs I've got at FOF forums are working fine when played with FretsOnFire (I do that first to check what difficulties/instruments are available), but when I import them to RawkSD, they show up in game as if no instrument is available to play, so RB2 says it can't continue the song and I'm taken back to song selection. I did the import like all the other half-dozen songs I've got there, so I'm lost on what could possibly be wrong here... Any advice?
Did you make sure to set a difficulty value for each instrument charted? Any instrument without a difficulty assigned will not show up, and a song with no instruments won't play. You can also get into a habit of running the midi files through Magma (available at creators.rockband.com with free registration) to check for midi errors.
The other thing is just a doubt if there's a better way to solve: some songs have the 1st note right on top of you when it starts. To avoid this, I use the "Silence" delay on RawkSD and push the song (and chart) 4 or 5 seconds so I have at least 4 or 5 sec to see the "guitar arm" onscreen before the 1st note shows up. Problem is, instead of showing the regular dark "guitar arm" onscreen, these 4 or 5 seconds put like a "white veil" over the guitar arm (the guitar arm goes back to normal when the "real time" of the song/1st note starts appearing). How can I push the song/notes and keep the "guitar arm" looking the same since the beginning ?
The "white veil", or "gray bars of death" as I call them, is what you see when RawkSD adds silence to any song (as seen with RB1 imports). This is because to allow specific time offsets in the centiseconds, RawkSD inserts the silence into the chart as measures at 24,000 bpm - the white bar is what happens when you display several thousand quarter-note runway lines per second. There's no way to turn this off yet, but it won't effect gameplay. It may be fixed by the program in the future.