You mean you can't enter the BIOS? Hit the Delete key or F1 (whatever key it says "to press to enter setup"). Then adjust the boot priority so that CD-ROM is higher than hard drive.
If that doesn't work (you can't see the CD drive in the boot sequence), maybe your BIOS doesn't support CD-ROM booting (older BIOSs). You must then use a floppy to boot the computer (or the hard drive).
John A
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