I upgraded my system last week.
M/board is ASUS P5WD2 Premium (Intel i955X chipset), 2GB PC6400 DDR2 ram, 3.0GHz Pentium 4 (630). 2x SATA2 250GB hdds.
FC4 would not install. This seemed to be because the SATA drives connect to an onboard "wannabe" RAID controller, and anaconda had difficulty trying to probe the drives through it, I'm guessing. I tried a lot of kernel parameters etc, but no joy. The machine kept rebooting shortly after "loading vmlinuz...". The discs are fine, I installed on the other system, and they all passed the mediacheck. Read the BIOS manual (!), made sure to completely disable all RAID features on the m/board so anaconda can see the SATA drives as IDE without the RAID confusion, but nothing. FC3 installer booted fine, but couldn't find drives to install on. In comparison, SuSE Pro 9.3 installed without a hitch and was fine (grub.conf actually had cc=IDE in the boot line), all drives and partitions and hardware good. Knoppix booted, nice and fast, could see drives but couldn't mount them as root. So this is really strange. Windows went on really quick without problems (sorry, only for testing :] ). Hardware config showed no errors in Windows.. So you get the picture - the usual nightmare..
Then I noticed that FC5 was available for download. I made up the cd's.
It found absolutely everything in one go. No unknown hardware, correct mouse, graphics, sound, drives, all 4 USB controllers, both IEE1394 ports and I've been enjoying some fine computing since last Thursday
I love it.
Fedora Core 5 is the best one yet for me anyway.