I have found the way of running beos from a cdrom now, the way i did it is by installing beos, then running beos and setting it up the way that you like it to run from the cdrom.
From there reboot back to windows and start up nero burning rom, select to create a bootable cdrom and select the Floppy.img that is located in the c:beos directory as the boot image and burn that to the cdrom.
After that has been burned to the cdrom, go back to nero and from the file menu select burn image, and select the other image file called c:beosimage.be and burn that to the cdrom as a block size of 2048.
then test out the cdrom and if every thing worked ok, it should bootup to a screen about installing beos onto your hard drive, so just press ctrl+alt+del and select restart desktop, then you can click on the installer program in the taskbar and select hide, thats all i have done so far with it all, hope this helped as well.