Okay I have try about 6 to 8 times(F90BT) to follow all the steps, but it seems that I'm doing something wrong i have formated the wince and copy all the files to my flash section ill finish and then i reboot the unit at the end.I turns back on I"ll select the language and the the region but after i do that it reboots and never leaves the pioneer screen..Please help any body what im i doing wrong,or if anybody has the original f90bt files please let me know where can i get them.And of course i did not back-up my files. dumb ass ME.