I used Windows 98SE to install this bios, you can use any operating system to install bios, i also added DFI's website to get these files Rev.A/B/C/D (on your motherboard it will tell you what Reversion it is example DFI P2XBL /Rev.A2 i have pic of motherboard.
The following files are found inside the driver download file.
|DRVSPACE.BIN||68.9 KB||23 Apr 1999|
|awdflash.exe||39.2 KB||19 Sep 2002|
|2A69KD49.BIN||131.1 KB||2 Jan 2001|
|IO.SYS||222.4 KB||23 Apr 1999|
|COMMAND.COM||93.9 KB||23 Apr 1999|
|read me 1st.txt||100 bytes||27 Mar 2005|
|Download BIOS DFI P2XBL.url||272 bytes||26 Mar 2005|
|F741.EXE||31.5 KB||28 Oct 1999|