Sorry, I don't know RH. But will share the Suse 9.1 comes with the 64-bit version good to go.
Also, KNOPPIX64 is ready and being upgraded as we speak. That's a no-install version you can see if they have it nailed in.
I installed Fedora Core 2 for x86_64 systems. I am trying to get support for ntfs so i can mount my windows hd but when i run the rpm thing for it. It says it could not be installed. Is this cause by the x86_64 architecture, and if so is there another or a fix for it. Another thing does anyone know if there is a x86_64 linux version of Wolfenstein ET? Thanks