ok...I opened the metal plate and fixed the loose cable to the CD-ROM. And, made the CD-ROM bootable (option 2 after diskette).
The 'config' in SMS showed id=7,p1/z1
18210 MB id, lun=0,0
cd-rom id, lun=1,0
It seems the system found both harddrive and cd-rom, and gives it different 'lun'...