You simply run the 32 bit installer. Nothing more than that.
Windows 1.0 to Windows 3.0 could only run 16-bit apps. Windows 3.1 could run certain 32-bit apps through call thunking.
Switching from 64-bit Windows to 32-bit would require purchasing and installing another copy of Windows. This is generally not necessary, anyway, since the 64-bit version can run 32-bit apps just fine.
In simple terms, 32-bit operating systems can only be able to run on 32-bit CPUs and 32-bit apps, but a 64-bit operating system can be able to run both 32-bit and 64-bit CPUs and apps.
Windows 7 (32 bit versions) have an emulation of DOS (cmd) that seems much more compatible than running DOS apps in Window XP. You can routinely run WordStar, PC Tools apps, many public domain utilities and various DOS accounting programs in Home, Professional and Ultimate versions of Windows 7. Remember though, they must be 32 bit versions. Windows 7 Professional has an XP compatibility window you can setup. Theoretically, in that mode under the 64-bit version of Windows 7 you might be able to run various DOS apps.
an application that can run from Windows' command prompt ($ theApp or $ run theApp). 32-bit Windows system (Windows XP for an instance), or running as 32-bit application only in Windows 7.
No special action is needed. 32-bit applications are run transparently.
Yes.
No you can't because 64-bit won't run on an x86 (32-bit) PC. You have to have the x86 version.
x86 is just another way of saying 32-bit. In Windows 7, the operating system is so good that it has 2 program files folders to store both 32-bit(x86) apps and 64-bit(x64) apps. This makes the operating system run a lot of programs. When you download an app, there may be files in it that are 32-bit based, even if the program is 64-bit compatible. What happens is that Windows runs both of them in working condition, in the 2 program files folders. If you are confused with what these 64-bit and 32-bit are, they're just defenitions for how much memory the operating system uses and the quality of the graphics and speed of processors in your computer.
Yes. It can run either the 32-bit or the 64-bit version of Windows 8. I'd recommend the 64-bit version.
No special requirements are needed to install 16-bit software on 32-bit Windows. Most programs that follow the 16-bit Windows API properly should run fine.
windows 7 starter only is 32 bit