You have to set the active partition.
You can do this by using a live CD - although you probably should have done it before you installed Fedora.
From a command prompt using any live cd, such as knoppix, type cfdisk /dev/hda (if it is a SATA drive) cfdisk /dev/sda
This will show you a list of your currently set up/formated partitions. From here change the boot flag to the partition in which you chose to install Grub. If you are not sure which partition you installed grub on - or even if you installed grub at all, repeat this process and reboot until you find the correct partition.
If you forgot to install a bootloader, installing one is very easy - providing you carefully follow this guide here:
http://www.gentoo.org/doc/en/handboo...part=1&chap=10
However in simple terms:
(hd,0) Is your MBR. If you have Windows installed, don't install grub to your MBR, instead install it to your /boot or / root (or the top level) partition. (The / is not the same as your root directory. Root is a user whereas / root is effectively what it says it is, it is the root where everything important is installed.
(hd0,0) is the first partition on your first drive
(hd0,1) is the second partition on your first drive.
(hd1,0) is the first partition on your second drive.
(hd1,1) is the second partition on you second drive
and so on... Basically you just count from zero.
Again like everyone else has said however, Fedora core 2 is very old now. It would be much better if you installed a more recent version.
Also read your book. Much of the fundamentals will be he same, even if the actual software itself has improved.