Maybe I did something wrong the first time! I repeated the process today but did NOT get any DSP window!!! How can I make the DSP windows to show up again?!

Why would you want that? CloseDSP.exe is there to CLOSE the DSP popups...

Does your closeDSP.exe work with all Windows languages, i.e. multilingual GUI ?

Thank you.

@Bâshrat the Sneaky:
Will your updated guide install only signed drivers? Or it was only to get rid of Driver Signing Policy popup?

Thank you.

It was only to get rid of the Driver Signing Policy popups!

Thank you.

I kept my finger on the T key....

And jtdoom is right: if you do it according to what I posted earlier, you might get a HUGE amount of Driver Signing Policy error dialogs - but if you only apply KTD on signed drivers you will get none...
So here's my updated guide:

Basically it's this:
1. Extract the DriverPacks to your PC, for example to %SystemRoot%\DriverPacks.
2.
a) Start closeDSP.exe:

closeDSP.exe

b) Execute makePNF.exe:

makePNF.exe %SystemRoot%\DriverPacks

c) End closeDSP.exe:

taskkill /f /im closeDSP.exe

3. Execute DevPath.exe:

DevPath.exe %SystemRoot%\DriverPacks

That's it.

Try changing that to silently suceed.

1. Extract the DriverPacks to your PC, for example to %SystemRoot%\DriverPacks.

2.  kill popup

3. Execute makePNF.exe:

Code:
makePNF.exe %SystemRoot%\DriverPacks

4. Execute DevPath.exe:

Code:
DevPath.exe %SystemRoot%\DriverPacks

Now, suppose that I have a fresh Windows XP with yellow exclamation marks on some hardware devices. What suppose I do after extracting DriverPacks and executing the two programs given above, so that Windows starts H/W drivers installation? Should I restart the computer or what?