After some testing I found the USB not very stable.
I tried to install myPS2 via USB with no luck. It always hangs after copying some files.(it installs without prob from MC or CD)
Don't know if it's my pendrive, my USB implementation or BM itself, but I think I remember having similar probs with BM 1.8 too. And my pendrive works perfect with uLE. I also tried uLE's USBMASS.IRX, but without success.
I hope the CCTeam fixes this, cause I can't do all their work
best regards Jones23