On 2008-05-08, supra <supradeep@gmail.com> wrote:
>
>
> can any body tell me as to what is free dos . and How i can install
> RH enterprise 4 over it.

Freedos is just what the name says, a free MS-DOS workalike.
http://www.freedos.org
Do you want to get rid of freedos, or install RH as a dual-boot? Either
way, just boot the RH CDROM or DVD and follow the instructions.