To install a Win95 CD-ROM upgrade clean install without installing Dos  or Windows 3x you either need a previous copy of the config.sys and autoexec.bat from Dos or you need to install Dos and then install the CD-ROM driver.
Then after the CD-ROM is installed, test the floppy that we are going to make then you can format the hard drive and start clean install.
Note: I suggest you do the same with any OEM Win95 CD_ROM.

Insert a clean floppy in drive A, considering A is your bootable floppy drive and type.
sys a:
That will copy the command.com to the floppy and will make it a bootable floppy.

Then copy Mscdex.exe, Emm386.exe and Himem.sys from Dos or from C\windows and from
c:\windows\command  to the floppy.

If you have SCSI then you need to copy Aspi8dos.sys(or Aspi7 or 6, you can tell which by looking in your config.sys,  also copy Aspicd.sys.


If you have IDE then you need to copy the CD-ROM file from the DOS CD-ROM installation disk or
from C under the manufacturer Directory, for example I have Samsung CDROM and in C:\Samsung
there is a file called Scr4x.sys, copy the file to the floppy.
DOS CDROM real mode driver have to be installed in order to see the file.

Copy your config.sys and autoexec.bat to the floppy.


Modify your Config.sys and autoexec.bat in the floppy to look like this, 
if you have SCSI(remember the 3rd line in Config.sys could be aspi7 or 6 etc depending what SCSI you have). 

And note there is A instead Of C in the command lines thus pointing to A rather than C.

===============================
THis is the autoexec.bat For SCSI

a:\mscdex.exe /d:aspicd0 /m:12  (m:12  is 4plex CD-ROM, if you have 2 or 6 or 8plex would be as in your line)


===
This is the config.sys for SCSI

device=a:\himem.sys
device=a:\EMM386.exe
device=a:\aspi8dos.sys /d
device=a:\aspicd.sys /d:aspicd0

===============================================

This is the Config.sys for IDE

DEVICE=A:\HIMEM.SYS
DEVICE=A:\EMM386.EXE 
DEVICE=A:\SCR4X.SYS /D:SSCD000( this is an example)
===
This is the Autoexec.bat for IDE.

A:\MSCDEX.EXE /D:SSCD000(This is an example)
================================================

Could be little confusing please let me know if you need more help, if you post your config.sys
and Autoexec.bat can tell you how to modify it.

In the above process we are able to recognize the CDROM drive, test it,
format the hard dive, insert the floppy in drive A and restart computer and insert your Win95 CD-ROM in drive and type D or E or F depending on
how many hard drives you have, CD-ROM always will be the last letter,
and click Enter then type Setup, win95 later will ask you to insert #1 floppy of any MS older Window version like Win311 to prove you have previous version of windows.

Note: You can add the following to the floppy to make it more functional,
Format.exe , checkdisk.exe , copy.exe , Extract.exe, fdisk.exe ,
Mem.exe .


Ted
