Hacking I need a tester with a Rock Band disc

[WiiPower]

I saw that Monster Hunter Tri wants to use IOS55 but also works with cIOS based on IOS37. So i ask if it does work the other way as well.

So could anybody please get SoftChip:
http://www.mediafire.com/?ne0orfmxuwy

Select IOS55 in it, check that "Load Requested IOS" is NOT selected and try to play Rock Band with USB instruments?

If the game doesn't boot at all with IOS55, but boots with IOS249, then you don't have cioscorp/darkcorp installed.