Creating a bootable CD with info file

Hi does anyone know how to create a bootable CD which includes an info file? linuxrc is supposed to look in the root directory of the initrd, but I can't figure out how to get it into the initrd and then rebuild the CD. I've tried the instructions at http://www.tcm.phy.cam.ac.uk/~mr349/suse/boot.html after having modified the boot/loader/initrd file but I get an isolinux checksum error when I boot the CD. All I have to show is about 15 unusable CDs! any help would be appreciated