Default bootloader for FC3 is grub. Once I did the update using `yum update' after the installation of my FC3, I had a problem in booting into the windows partition. I got some help from WPLUG (www.wplug.com) mailing list and I changed my /etc/grub.conf and it worked perfect (basically I had to change the rootnoverify line). This is how my grub.conf looks like now:
# 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 (hd0,2) # kernel /vmlinuz-version ro root=/dev/hda5 # initrd /initrd-version.img #boot=/dev/hda default=0 timeout=5 splashimage=(hd0,2)/grub/splash.xpm.gz hiddenmenu title Fedora Core (2.6.10-1.760_FC3.stk16smp) root (hd0,2) kernel /vmlinuz-2.6.10-1.760_FC3.stk16smp ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.10-1.760_FC3.stk16smp.img title Fedora Core (2.6.10-1.760_FC3) root (hd0,2) kernel /vmlinuz-2.6.10-1.760_FC3 ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.10-1.760_FC3.img title Fedora Core (2.6.9-1.667) root (hd0,2) kernel /vmlinuz-2.6.9-1.667 ro root=LABEL=/ rhgb quiet initrd /initrd-2.6.9-1.667.img title Windows rootnoverify (hd0,1) chainloader +1