FreeDOS is a complete operating system. For new users, we recommend installing FreeDOS in a PC emulator or "virtual machine." If you install FreeDOS directly on a computer, without using a PC emulator, you may overwrite the operating system you have now (for example, Windows.) Please be careful.
If your computer cannot boot from CDROM, use the boot floppy. Write this image to a floppy with Rawrite or dd, boot it, then insert the install CDROM when the install program starts up.