The guide seems overly complicated.
Here's what I do in this case:
Get yourself a set of DOS 6.22 install disk images and a Windows 98 or ME boot/rescue floppy disk image.
In the SLOT options for the at486 driver, install the CDROM device, in the FILE dialog set your harddisk image and the first floppy image. Remember to reset your driver after big changes like hardware options, you can change floppy disks later without resetting.
Start the at486 driver and enter the BIOS settings. Match the harddisk parameters to the image you installed for your first harddisk, leave the second drive (CDROM) set to none.
In the advanced settings of the BIOS, set the boot order to "A: C:"
Then exit the BIOS settings and boot from the first floppy. Run the setup, you might have to reboot the machine in between if you're using a brandnew harddisk image where no partition is set yet.
After the installation, remove the last disk image from the virtual drive and reboot to DOS from the harddisk.
Then insert the Windows rescue floppy disk image and copy the file "OAKCDROM.SYS" to your DOS folder (or any other location, you just have to know where it is).
Don't bother with freeing memory for now, first make sure the CDROM drive is recognized. Add the line
to your config.sys file (after himem.sys) and
to autoexec.bat (after the path statement).
Then reboot, and the CDROM drive should be recognized by the driver and installed by MSCDEX as drive D:
You can then insert an ISO image and work with it.
My installation has 544KB memory free for DOS. Running MEMMAKER increases this to 633KB.
Edited by rfka01 (03/26/17 10:03 PM)