How to install drivers which do not have setup.exe

As you know some drivers do not have setup.exe. They only have some stupid .inf files. Some visitors ask me that how to install this drivers.

Please follow my instructions;

1.On the desktop right click on MY COMPUTER.
2.Select MANAGE.
3.In the "Device Manager" select the adapter you wish to update.
4.Double click.
5.Select DRIVER.
6.Click UPDATE DRIVER ... .
7. Follow the instructions given by Windows XP (x86) to locate the driver.
9.If the driver which is found to be the latest is not the one you want to install, select the checkbox "Install one of the other drivers".
9.Click NEXT.
10. Select the driver to be installed in the next listbox.
11. Click NEXT. A message will be displayed that the driver is not digitally signed by Microsoft.
12. Click YES. The message "Windows has finished installing the software for this device" is displayed.
13. Click FINISH to complete the installation.