[CentOS] Edit to change startup from SMP to not so SMP

> > I have an issue on a server that stops to ask SMP or not so SMP on 
> 
> what OS ?
> 
> either /etc/grub.conf or /etc/lilo.conf
> 

Ok, it was grub, and this is what I have......  I see default=0 how should I
change that to one of the items below????

Thanks,


default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.9-42.0.2.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-42.0.2.EL ro root=/dev/main/root
        initrd /initrd-2.6.9-42.0.2.EL.img
title CentOS (2.6.9-42.0.2.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-42.0.2.ELsmp ro root=/dev/main/root
        initrd /initrd-2.6.9-42.0.2.ELsmp.img
title CentOS (2.6.9-34.0.2.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-34.0.2.EL ro root=/dev/main/root
        initrd /initrd-2.6.9-34.0.2.EL.img
title CentOS (2.6.9-34.0.2.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-34.0.2.ELsmp ro root=/dev/main/root
        initrd /initrd-2.6.9-34.0.2.ELsmp.img