Downgrade BIOS from A04 to A00 using Ubuntu

Would anyone be able to tell me how to downgrade the BIOS from A04 to A00 while using Ubuntu 8.10? I have instructions as to how to do it from...

http://bigbrovar.wordpress.com/2008/12/ ... on-ubuntu/

My systemid is: 0x02B0

Visiting the page...

http://linux.dell.com/repo/firmware/bios-hdrs/

I could not find the version for my system ID

Can anyone help please?

Thank you.

drmank