During the installation of Windows 98, you may experience problems during the installation process that require you to run the Setup procedure from DOS.  Here's how:

1.  Create a bootable floppy with CD-ROM drivers.  Insert the floppy disk and boot your PC.

2.  From DOS, change to your CD-ROM drive by typing:  D: {ENTER} where D is the CD-ROM drive letter.   Type: CD WIN98{ENTER} then SETUP {ENTER}.  You're now on your way.