I have a 270M hard drive. (are you done laughing? A whole Mac ran on this long ago.) And 512M RAM.
I was able to install 4.0 from the live cd onto the hard drive. I made 1 partition and there's 105M left.
(5.x live cd graphics were a strip of pixellated colors at the top of the sceen, but that's for another thread)
The machine boots from the live CD and from a usb stick I made, but not from the 270M hard drive.
I can see that there are appropriate-looking files written on the hard drive, I can write a text file and save it on the drive.
So why won't my teensy hard drive boot up?