How to update BIOS on Satellite L40-13G

Hello everybody!!
I want to update my BIOS, but doesn't know how to do it. I looked instruction on a site:
Option 2: Update with CD-ROM
1. Extract the zip file containing the BIOS upgrade to a temporary folder.
2. In the temporary folder three sub folders will be generated. "docs", "Update - 3,5' Disk", "Update - CD-R or CD-RW"
3. How to make a bootable CD-ROM please read the *.pdf file in the "docs" folder.
4. Ensure the Notebook is connected to the mains.
5. Turn the Notebook off.
6. Place the CD-ROM containing the BIOS upgrade in the optical disk drive.
7. Turn the Notebook on with the F12 key.
8. The BIOS boot menu appears. Select CD/DVD or the CD-ROM symbol using the arrow keys. Press "Enter".
9. The Notebook will boot from the BIOS upgrade CD-ROM.
10. A boot menu appears. Select the point for update the BIOS by using the arrow keys. Press "Enter".
11. The BIOS update process starts. Do not switch off the notebook during update.
12. If the update process is finished follow the instruction on the screen.
Downloaded such update of bios: bios-20070904123621.zip
Page with update file: http://eu.computers.toshiba-europe.com/cgi-bin/ToshibaCSG/download_bios.jsp
Then I decompressed zip,.. and didn't see three directories, which written about in instruction (from above).
Help please, what I must to do. Or how to update my BIOS?
Thank you!

Listen Alexey!!
At this time you can find the BIOS 2.20-WIN for Satellite L40 on the Toshiba European driver page.
This is a *windows-based* version of the BIOS. Its *NOT* traditional BIOS version.
In such case you cannot update the BIOS using a diskette or CD. The BIOS update must be performed while the OS is running!!
However, the BIOS update is tricky and always RISKY!!! If you have no problems with your notebook, dont update anything!!!
The wrong BIOS or wrong BIOS update procedure can damage the board!!!!

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How to update BIOS on Satellite L40-13G

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