Hopefully the following will help
Diskless Fedora Install
Last Updated: Sun May 30 08:57:21 EDT 2004
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UPGRADING TO FEDORA (DISKLESS INSTALL)
It's possible to completely install Fedora by downloading the *.iso image, mount
it to a loopback device, copy the Linux kernel images to /boot, modify grub, reboot, then
have it find the *.iso image for the rest of the install.
Download the complete DVD package. It's 4 GB:
Once downloaded check the md5sum
Create a directory off of root for mounting the iso image.
The DVD image file can be mounted with the following command:
mount -o loop -t iso9660 /FC2-i386-DVD.iso /iso0
Copy /iso0/images/pxeboot to the /boot directory
cp -r /iso0/images/pxeboot /boot/.
Modify Grub to include the following:
title Fedora (INIT)
Special note: Look at the other grub entries "root (hd0,1)", perhaps
it's listed as "root (hd3,0)" or (hd2,0). This must be the same, so
change hd0 above to match the other entries.
Make note of where FC2-i386-DVD.iso resides by issuing the "df" command.
$ df .
You'll need this location after reboot. It's something like /dev/hda1 or /dev/hdb2
Reboot. When asked for the location of the "iso" file select FILE on the Fedora menu.
put in the /dev/hda1 location above. Note if it's in a subdirectory off of this
filesystem there is a text box to enter that as well.
The install should proceed on it's own from here.
Perhaps you're running Redhat 8.0 or Redhat 9 and only want to upgrade to the 2.6
kernel from source.
Reference (This also includes information on creating your own 2.6 kernel modules):