I've found that if you set bootsplash to an invalidly formatted image, GRUB will produce a blank screen until it boots the OS. That hack, combined with a password, provides plausible deniability similar to what the TrueCrypt Windows-only bootloader features.

Quote Originally Posted by supertails View Post
What if I don't have menu.lst?
Then you have either grub.conf or grub.cfg. The latter's format differs from menu.lst, but it is similar enough to work.