Whatever version of Nero 6 you have should be enough to update (note: not Upgrade) to the latest version.
I have recently updated my OEM version 6 to Nero Reloaded except for InCD. The latest version of InCD appears to have many problems. I now don't use InCD at all because of that.
If you are unable to download these updates yourself I have them all on my hard disk and I can easily burn them to a CD and post it out to you. email me via the envelope.