are you trying to shoe horn a chromeos build from github or a hexxeh build of the os onto the hdd?

did you follow along with this guide and run into some specific blocks?

http://chromeos.hexxeh.net/wiki/doku.php?id=multiboot

i dont know that its taboo more than it is just too technical for the amount of people that just check it out from a usb install and then return to their normal operating environment

or it makes up a part of their decision to buy one of those cr-48 dealies