ok i have a toshiba tecra 8100 laptop

ok so i put the cd in and im thinkin this is gona be so easy. i reboot and i load from the cd then it says boot: so i just hit enter and it starts booting then it stops and sayes:

cannot create union/etc/fstab: directory nonexistent

changing root directory...

cant find executible chroot command

and it telles me to reboot and try again so i did and it alwasy sayed exactly the same thing! please help