Instructions:
1. Make Bootable Floppy Disk
2. Extract all files of the ZIP file onto Boot Disk
3. Reboot PC with Boot Disk inserted.
4. Type 
   update.bat <return>
   F/W will now be updated (you may be prompted to insert a disk, any CD will do)
5. Wait for Flashing to finish.
6. Reboot PC

[Disclaimer]
Toshiba will not accept responsibility for any damages incurred due to use of this software.
This software is provided "as is" and should be used by technically experienced persons only.