Fedora :: How To Change Default OS To Vista

I can only get so far and then I find myself staring at the menu.lst (/boot/grub) in gedit. It looks nothing like the menu.lst in Linux Mint 7 and I know that tampering with the menu.lst could spell disaster. So how do I go about changing my default OS to Vista? I have been tinkering with distros for quite some time now but still not a pro.Take a look at what I got below.

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,1)
# kernel /vmlinuz-version ro root=/dev/mapper/vg_localhost-lv_root
# initrd /initrd-[generic-]version.img
# boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title Fedora (2.6.31.6-162.fc12.i686)
root (hd0,1)
kernel /vmlinuz-2.6.31.6-162.fc12.i686 ro root=/dev/mapper/vg_localhost-lv_root noiswmd LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet
initrd /initramfs-2.6.31.6-162.fc12.i686.img
title Fedora (2.6.31.5-127.fc12.i686)
root (hd0,1)
kernel /vmlinuz-2.6.31.5-127.fc12.i686 ro root=/dev/mapper/vg_localhost-lv_root noiswmd LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet
initrd /initramfs-2.6.31.5-127.fc12.i686.img
title Windows Vista
rootnoverify (hd0,0)
chainloader +1