Boot from IMG image

[pointd]

Using Nero I have created a bootable CD from an ISO image but I can only get some systems to boot from this disk. Checking the contents of the CD there is only a single file, this being CDROM.IMG.

The system that will not boot from this disk will boot from other bootable CDs containing multiple files (i.e. not just the single .IMG file) and if I use a Windows startup disk to get DOS CD support then the drive can read the CD.

If it's relevant the system I am trying this on is a NW6 server which has a 10 GB SCSI disk which has a 250MB DOS partition and the remainder of the disk is a Netware NSS volume.

Is there a BIOS setting to enable me to boot from this or is there something else.

Thanks in advance.