http://www.msfn.org/board/index.php?showtopic=22895&st=20&#entry163905

Files information:

- BDANT.cab > Windows NT and 2000
- BDAXP.cab > Windows XP (and 2003?)
- DXNT.cab > Windows NT/2000/XP/2003
- BDA.cab > Windows 98 and ME
- Directx.cab > Windows 98 and ME

/silent with the original dxsetup.exe on Windows 2000 (using SVCPack) doesn't work. There are two errors: GDI32.dll and USER32.dll when running dxdiag

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Guide to make a Silent Directx 9.0C install:

1- download directx 9.0c redist
2- extract
3- replace the dxsetup.exe by the new one here (a user already posted it up there)
4- You can delete Directx.cab and BDA.cab if you are running on Windows NT/2000/XP/2003
5- Start > Run > iexpress.exe
6- select "create new self extraction directive file"
7- select "extract files and run an installation command"
8- title: dx90csilent
9- select "no prompt"
10- "do not display a license"
11- add all the extracted files
12- in the first combobox (install program), select "dxsetup.exe" and add this string at the end: " /install /silent". It now should be "dxsetup.exe /install /silent"
13- select hidden
14- select "no message"
15- choose a path where the EXE install will be saved AND check "hide file extracting progress animation from user"
16- select "no reboot"
17- select "don't save"
18- click next
19- Done!

Now you have a full silent install. You can start it where you want (svcpack included).