I guess you can boot using a USB pen. To boot using a USB pen you need to put raw image called /images/diskboot.img to the usdb pen. Use dd command (don’t just copy using cp command)
Code:
# mount /mnt/cdrom
# dd if=/mnt/cdrom/images/diskboot.img of=/dev/sda
Replace /dev/sda with actual usb pen drive. You can use dd command from any Linux, BSD or UNIX system.
Then go to BIOS setup and set booting from USB and save BIOS and start installation from USB.