[flashrom] How to identify a BIOS file

[890gx at hushmail.com]

I downloaded the following BIOS update for the MSI 890GXM-G65 
(http://www.msi.com/index.php?func=prodmbspec&maincat_no=1&cat2_no=&
cat3_no=&prod_no=2012).

http://download1.msi.com/files/downloads/bos_exe/7642v12.zip

The zip file contains the following files:

4.0K 7642v12/7642v1x.txt
2.1M 7642v12/A7642AMS.120
148K 7642v12/AFUD4310.EXE
 56K 7642v12/How to flash the BIOS.DOC

Am I right to assume that the largest file "A7642AMS.120" (2.1 MB) 
is the BIOS file? Here's the edited result of the "file" command on 
the files within the directory:

7642v12/7642v1x.txt:               ISO-8859 English text [...]
7642v12/A7642AMS.120:              data
7642v12/AFUD4310.EXE:              MS-DOS executable
7642v12/How to flash the BIOS.DOC: CDF V2 Document, [...]

The file "A7642AMS.120" is identified only as generic "data".