If you have a cloned drive of your old server, you may want to try this on the cloned drive. This is a really fast way to get up and running even when changing hardware. Just install the cloned drive of your old server on the new box, but don't boot it up. Then put the 6.0 cd and boot to it, and let it upgrade the old server's configuration on the new hardware. This worked for me many times, even when I changed from Intel to AMD cpu, with totally different mobo's and chipsets. However, ONLY TRY THIS IF YOU HAVE a backup drive of your old server. Because things could go very wrong., but it may work fine, especially if the hardware is quite similar.
-Ralph