Download the fedora core 5 .jigdo and .template files for all 5 CDs from *download.wpi.edu/pub/jigdo/ . Then install jigdo by typing "yum install jigdo" now just type "jigdo-lite <path to FC5disk1.jigdo file" it will ask you the location of DVD drive eg "/media/disk-1". Jigdo will then create the iso files. Do the same for each of the 5 CDs.
P.S: Im saying again, it didnt work for me, the installation failed.