The upgrade from fedora core 4 to fedora core 5 went fairly well ( using the upgrade method mentioned here... ) except for a hiccup with the X display using the current nVidia driver. Luckily Stanton Finley maintains an upto date FC5 installation notes with which I was able to quickly troubleshoot the nvidia display driver. Here is a synopsis of what I did to fix it: Got the system updated via yum