GRUB for DOS is a rebuild of the GNU GRUB boot manager for DOS, and can be run under real mode DOS. It also has many new features.
For example, it can be booted through BOOT.INI of Windows (grldr) and kexec of Linux (grub4lin).
The disk emulation feature is another enhancement over GNU GRUB, and can be used to run legacy DOS/Windows9x systems with floppy or hard disk images.
http://sarovar.org/project/showfiles.php?group_id=320
0.4.3 2007-10-15 05:30 0.4.3pre2 2007-07-25 05:30 0.4.3pre1 2007-06-22 05:30 0.4.2 2006-12-31 05:30
If you get "Service Unavailable", just wait for a few seconds and try again.