Installation ISOs for SCO Openserver are difficult to find on the internet, so I am making the ISOs I have available for download here:
SCO Openserver 5.0.0 Installation ISO (Not bootable)
The N0 and N1 disks are in the CD, to install in a virtual machine I also required the updated WD Boot Time Load Driver then I used the boot string:
restart link="wd" Sdsk=wd(0,0,0) Srom=wd(1,0,0)
SCO Openserver 5.0.4 Installation ISO (Not Bootable)
SCO Openserver 5.0.5 Installation ISO (Bootable)
SCO Openserver 5.0.6 Installation ISO (Bootable)
Download the SCO Openserver 5.0.6 Installation ISO here.
SCO Openserver 5.0.7 Installation ISO (Bootable)
This ISO is available from the Xinuos website but it can be quite slow.
Boot Time Load Drivers and Boot Floppies
Bela Lubkin has a list of links and downloads for updated boot floppies on his website, which can be useful if you are trying to install any of the above.
Click here if you need SCO Unix Support.
Really hope this is helpful to you.