It might help to know more about your setup, as in, what IDE interface do you have in there? If the cable's connected directly to the internal port, and you already have a hard drive in there, you have to be careful that the cable's not too long, and that the internal hard drive supports a slave drive. If you have some sort of buffered interface, you have to have either a patched scsi.device or a separate device for the interface for using with the CD mountlist...