How can I re-install ITunes and upgrade to 7.01, I tried to use Iridium theme on Itunes and after that got a message there was not enough memory to open. I then reinstalled it(using Pacifist) from Installatiion disk and when I try to update it tells me that there is nothing to upgrade when I know there is. Is there any file that I can remove so I can upgrade. Thanks

Why did you do that? That's exactly why it's messed up. Pacifist isn't perfect.

My guess is that Iridium is using too much memory on your Mac, and so you should probably uninstall that (or at least just to make sure you can do it without coming up with "not enough memory" errors).

What I think you should do is delete iTunes.app, and then visit http://www.apple.com/itunes/download/ and download iTunes 7, and then install it using the included installer.