I agree, gerald_clark. I tried version 4 a few months ago, but kept running into difficulty with the install. I did post about my problems here on the forum. now I have a quad-boot computer with xp, win7, OS4 and tinycore with grub and grub4dos to boot everything and it was a miracle that I got it to work. I don't dare to try to reinstall. I don't think it would work. even if the install worked, the booting issues are even more finicky.
if it was just tinycore by itself on the computer, I would have no reservations whatsoever. in fact, I may try that later on a different computer.
I will try to get the jre that you mentioned earlier.