Thank you guys, I always wanted to try this but I thought it was too complicated, and I thought Rawksd was some kind of tool to import dlc songs only.
But seeing this tread convinced me to finally try it, and after a couple of hours of research, trial and error I was able to get to work rawksd 2.2, and then the 3.04 beta.
I must confess, it's a little redundant for me as I collected every GH/RB discs, but the idea of creating a playlist of my favorite songs from across every game and get it all in one place (RB2 ) was pretty darn intriguing.
MAJOR headache today to get rawksd 2.2 to work, sfter hor of research I found out about that iso 37 problem, and how to use dop mii to install the right version ( that rawksd tread is huge and it takes hours to navigate trough ! ) and the correct date to set my Wii to ( for me it worked december 2010, the 1/1/2001 date didn't work ) and finally place the right files in the right folders of the SD card.....but in the end, I got it to work.
I quickly realized that for the scope of the operation, and the number of songs I intended to import, my humble 2GB SD card wasn't gonna be enough.
I then decided to move on to the beta version, and although I liked the fact that you can boot the disc trough the application and start playing without installing the songs, when I found out that RB3 wouldn't boot I was turned off, but then I saw that it can store songs on the HDD and it was an instant win !
I only needed to reinstall a clean ios 37( done by rowksd 3.04 itself ) and re-rip that couple of songs I was testing, and it was smooth sailing.
I also tried to use the rawksd 2.2 imported songs with RB3, but they weren't recognized. Maybe I did something wrong, but anyway, at the end I settled with rawk3b4 and RB2 with the songs on the external HDD and I couldn't be happier!
It's only weird, and mybe it has something to do with ios 37, but the timing of the strumming seem to be slightly off after all of this, in fact, i played a coulpe of songs that I'm pretty sure I'm good at, and I made a lot of mistakes !
I hope a simple in-game calibration is all I need, if I had to re-rip every song and change the setting, I'd rather burn all my discs