So you didn't have to make your own disc and stuff, that's just pointless and time waisting... And about the stages, if some work and other don't you are just renaming the files wrong or the stages just won't work for you because of the rel files (the rel files everyone includes are for the ntsc-u disc, they aren't compatible with the pal disc :p)
Uhh... You didn't make the Private folder It's supposed to be like this (X):\private\wii\app\RSB(X)\pf\sound\ Not this app\RSBE01\pf\sound also not like this wii\app\RSBE01\pf\sound
You could also just try getting a fully completed save file, just put it on your sdcard and copy it over to your wii (you have to disable that copy protection that the wii has with some games, I did that with priiloader)
or you can try a code if it exists, just search on google or something.