This is my grub.conf:

# 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 (hd0,4)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=10
splashimage=(hd0,4)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.9-1.667)
root (hd0,4)
kernel /vmlinuz-2.6.9-1.667 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.9-1.667.img
title Windows XP
rootnoverify (hd0,0)
chainloader +1

doesn't this mean that Windows XP is the default os? but when i start at boot time, the default os being booted is fedora....

This means that the first configuration is the one booted by default. Change it to 1 if you want to boot Win

thanks for the reply mebrelith... problem fixed... gladly appreciated...