I think you are mixing so many things in a pot and couldn't tell which is which.
First of all stop complaining the installation problem if you think Fedora has been installed correctly so the problem lies with booting it.
You have XP operational. The steps of creating boot.lnx and editing XP's boot.ini is asking XP to boot Fedora. This is a waste of time as you haven't got a working Fedora so copying it unworkable boot loader brings no benefit. So concentrate on using Fedora to multi-boot XP as it is about 10 times easier.
To rescue Linux requires tools. Do you have any Live CD? to follow Task B5?
You have Fedora installation CD but can you boot it up and has the kernel available for you to use? so that you can execute Task B4 or B5?
At this moment of time just concentrate on "restoring the boot loader" into the MBR. Simplify your problem.
I have just booted up the Fedora C6 CD. Pressing F5 is the rescue mode. Then type "Linux rescue" as instructed by the CD will boot you to a terminal.
You are then having a full use of the kernel, Bash shell and the full set of terminal commands at your disposal.
Your entire Fedora partition is mounted in the /mnt/sysimage directory. You can actually see all the files, edit them and do whatever rescuse work that is needed.
Therefore to get inside the unbootable Fedora you use the "chroot" command to change root from the boot up CD Linux into the unbootable Fedora Linux
Once inside you restore Grub to the MBR by command
On a reboot you should see Grub if the installer has done its job.