actually its pretty easy to obtain any earlier bios version
i.e. this is the link to the newest bios for my qosmio x770
http://cdgenp01.csd.toshiba.com/content/support/downloads/sby5v170.exe
if you would like to obtain the first ever bios which was 1.10 simply change the download file name to:
http://cdgenp01.csd.toshiba.com/content/support/downloads/sby5v110.exe
voilla. thanks to MaciusPL (i hope im remembering his nickname correctly)
as for the media keys, have you been messing about in your msconfig configuration? mine stopped working after i had turned off all of the toshiba rubbish processes. but i couldnt care less, i dont use these buttons except for the volume, which work perfectly fine without the drivers
peaco&lavo