64-bit versions of the Windows operating system support 32-bit applications, thanks to something called "emulation." Though a 32-bit application would not inherently work in a 64-bit operating system, Windows makes this possible by making the program "think" that it is being opened using a 32-bit operating system. Therefore, if you want to convert your copy of Windows 64-bit to 32-bit to run those applications, all you really need to do is run the application. Windows will perform the conversion and take care of the rest.
Select "All Programs."
Open the folder that contains the shortcut icon for the 32-bit application you're trying to run. This will expand the folder into a listing of icons beneath that folder.
Click on the shortcut icon for the 32-bit application you're trying to run. Windows will start the emulation process, which will convert a portion of your operating system to 32-bit architecture. The 32-bit application will then load inside that portion of Windows and will display properly on screen, as if you were running a 32-bit version of the operating system.