Edit /etc/lilo.conf. The first entry is the default OS. Check out the
lilo.conf man page ("man lilo.conf")
> ----------
> From: Federico Zurro[SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, October 19, 1999 9:29 AM
> To: '[EMAIL PROTECTED]'
> Subject: LILO
>
> Hi.
>
> How can I change the default Operating System in LILO ?.
>
