How to boot cd-rom from under Grub prompt

["nicosoft" <nicosoft@163.com>]

Hi,everyone:
  
I search in the google for the question above,but without a clear answer.
  
The boot order of my box is HDD CDROM ,and I have no floppy driver.
  
Recently I want to intall other OS into my box,but I forgot the password
of my bios,so I cann't change the boot order to make it boot from cd-rom.
But I have a Grub works well,so I am just wonderring  is that any way to boot from 
cd-rom under the Grub prompt,since we can boot into other OS under that situation.

Thanks anyway.

Nico Chan

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