Also, if you have WinZip or WinRar installed, and right click on the exe, the context menu for each program will list the option to extract if it's supported.
Failing this, if you have a system with the driver installed on it, you can look in the inf directory under the windows folder, and check for any files listing oemx.inf. You can double click on any of these infs to open them in notepad, and confirm the inf is correct for that driver you want to distribute.
Once you've found this, you can continue looking through the inf to find the dependent files (.sys, .dll, etc).