Since, DOS is a single user, single tasking OS, you can not have 5 sessions together. Yes you can open and use separate DOS shells in Windows..
You can't run MS-DOS, windows is different operating system. You can type cmd to invoke command prompt. Also, you could install DOSBox to run DOS programs, OR install VirtualBox and install DOS inside it.
The disks to install MS-DOS only came on floppy disk, not CD. It is theoretically possible to make an installer to install it from a CD drive, but I doubt anyone has ever tried. FreeDOS, an MS-DOS compatible clone, is capable of being installed from a CD.
You add your mom!!!
DOS only supports the generic based printers.. You need not to install any printer in it as it always use Generic Text printer driver.. You can only use Dot Matrix Printer (DMP) in DOS without any driver..
You can directly execute its setup file..
concurrent
DOS is well-suited for older computers that are not powerful enough to run a modern operating system such as Linux or Windows. If you have a modern PC, DOS programs can be run with DOSBox.
You do not need to "install dos". DOS is already installed in all computer running any Microsoft OS (operating system). To access the DOS terminal simply click the start button, click run, then type cmd and hit enter.
You have to install windows 98 using the OEM CD from Microsoft (or you can download it as a torrent file). If it is a DOS-window, then with command EXIT, or if you booted in DOS-mode, then use command WIN (or reboot your computer).
Concurrent Powers
In Windows, press F8 during booting.. You will find a menu in which you will fine an option - "Safe Mode in DOS Prompt".. Enter in that menu, you will boot from DOS Prompt.. In Windows 98, you will find the "Boot from DOS prompt".. You can select that option to boot from DOS..