I want to upgrade the bios in my 400SC from A04 to A06. I have a couple of questions.

1. There are three files in the Download section http://support.dell.com/support/downloads/format.aspx?releaseid=R76543&c=us&l=en&s=dhs&cs=19
do i need to install all three or just one of the three. I think only One of the three. but would like confirmation.

2. Is A06 th latest version?

3. What is the fastest Processor this bios will work with if I wanted to upgrade from the 2.8 G i currently use?

4. IS there anything else i would need to do besides install the new CPU?

Thank you

Rick sTuve