I just wanted to tell you, that we have made a thread and I think we have the "solution" for the SCPH-9000X Problem.
Just like jimmikaelkael said (i can't find the thread right now) FMCB can't be launched on the SCPH 9000x models, because of the new bios.
This is true.
But there seem to be SCPH 9000x models with the old bios version.
They seem all to be produced before March 2008.
In this thread some of our members listed if FMCB is working or not and their Date-Code. I Think even if You don't know german you will understand it
Hope that will help some people =)