Preorder windows 7 when its price is only £99, and happily received it yesterday (Have to travel 15 miles to pick it up local depot of CityLink though). I tried to install it on my iMac today, but as I expected, it has the same issue mentioned in my previous blog.

http://elian.co.uk/post/2009/05/11/Installing-VISTA-x64-on-iMac.aspx

Update:
I can confirm the old solution still works, just little note that, you need to disable UAC or use Run as administrator to install BootCamp drivers.

After upgrading XP to VISTA recently, my hard disk seems getting a lot busier than before. It is very annoying, especially during a quiet mid-night. You just feel VISTA keeping f*k your HD, even you are doing nothing!

Check the 70+ processes running at background, which none of them is my application, no Visual Studio 2008, no IE, no firefox, no Photoshop...... just VISTA servies!!! One process is really bringing my attention, "searchindexer.exe". It belongs to VISTA new Windows Search Service. In theory, all those sort of indexing service should running when your PC is idle, but this indexer seems very like to compete with other processes. It normally takes 1-7% of CPU, takes more when copying stuff, and uses even more when some heavy processes running. It really kills the overall performance of your VISTA box.

To stop it is very easy, just go to "Service" in whatever way you want to. My way is Win+R, services.msc. Find out "Windows Searh", stop and disable it. I read some other blog, people always left comment to argue index service is light weight service, it has very low IO. But the truth is, after disable it, I can feel there is less hard disk activity.

Another annoying service is superfetch, as describ by Microsoft

"Windows SuperFetch enables programs and files to load much faster than they would on Windows XP–based PCs."

Mmmm, maybe. But it eats me so much memory for the preload applications which I may not use. I never do some testing to see how much I can benifit on openning an application, but at the mean time, it takes me lots of memory, and make VISTA load like a tortoise.

Note: I killed both services on my machine, but it doesnt mean I suggest you doing this as well. using a common phrase "You are at your own risk" to do this. ^_^

I bought my iMac 24" months ago and upgraded 4 Gb RAM immediately after bought. But I was using XP 32bit in the past months, the reason is simple. First, Apple does not officially support VISTA b4. The result is that you cannot install Boot Camp without a little trick. Secondly, 4 Gb RAM can still be used under 32bit system by using PAE (Physical Address Extension). I really dont want to risk my hours to re-install OS.

Recently I get more and more interesting in WCF TCP binding in IIS, I have no choice to get VISTA on my machine. (Well, VMWARE is pain to use during development) It gives me a chance to think should I get 64 bit VISTA instead 32bit. No matter which one, I will need to spend hours on it, nothing to lose. ^_^.

Right, back to my story. Trying to install VISTA 64 on my iMac last week, Boot Camp wizard, partition, reboot to install, everything Apple done is smooth, beautiful and easy.

After machine rebooted, load disc, stop!!!!!

1.
2.
Select CD-ROM Boot Type :

This first message VISTA 64 gave me. As explained by Microsoft:

Google the answer, you may find a quite complex solution from Jowie 

Or a much more simple solution by Sergio, I used Sergio's way,because I am using a DVD instead of image, my procedure is a little easier.

1. Download oscdimg (external link) and put it in a easy access path, such as c:\
2. Check the space on your hard disk, make sure there is 3.6G at lease space on one of your disk partition.
3. Open a command console and run

oscdimg -n -m -be:\boot\etfsboot.com e:\ c:\vista64.iso

e: is DVD drive

After it finishes (around 5 minutes on my computer), just burn it to disk as normal, and you should be able to boot into VISTA installation wizard now.