Q: "bootcamp x64 is unsupported on this computer model" - Any new information??

Thanks - this appears to work perfectly! 

The only additional issue I had is that the bootcamp installation hung for quite a while on "atigraphics".  (I have a 2009 24" iMac.) Eventually I had to cancel the installation.  Based on another thread, I moved the ati folder out of the drivers folder and reran the bootcamp64.msi and then it ran fine.

Worked for me, many thank!

Argh! As a PC newbie, can you or someone please give me more detailed instructions on doing this? I'm referring to this process...

1. In Mac, Burn the files to disc via bootcamp
2. In windows move that file to the desktop in a folder
3. Then launch command prompt as administrator
4. do cd.. until youre at c: (cd.. cd.. cd.. cd.. cd.., etc)
5. cd users
6. cd yourusername
7. cd desktop
8. cd bootcamp_foldername
9. cd boot camp
10. cd drivers
11. cd apple
12. bootcamp64.msi

I've gotten as far as opening a command line as an admin, and I only assume I'm doing the right thing by doing CD.. over and over. It says I'm on C, and I did Users and that went fine, But from there, my username just gets me a msg saying "'eric' is not recognized as an internal or external command, operable program or batch file".

And so here I sit.

If your Username has spaces you need to enclose in double quotes, for example if your username is "Erci Root", then .

cd "Eric Root"

You can also type cd Er and press tab, which should expand and quote your username as necessary.

Thanks for this tip! It actually got me past that one, but only that one! now that I'm on 'desktop', I'm met with the same message as previously. What's the trick this time?

WAIT! Never mind. I think I got it. Stand by...

Okay, so I got all the way to the BootCamp64 file, but it told me, as other methods did, "The installation requires elevated priveleges. Launch the installer through setup.exe." Anyone know what I can try now?

CANCEL THAT AGAIN! I wasn't in Admin mode when I thought I was. All good...for now. Thanks again.

hey it will be useful to let people know they can launch command prompt as an administrator by going to the windows icon in the lower left, clicking on it, then typing in the search box 'command prompt' and then RIGHT clicking on it, then choosing 'Run As Administrator'. Otherwise they will not have sufficient privileges to run the msi application. Cheers and thanks for your other points though

Mac Pro 1,1 (2008), trying to install Win 7 64b with Radeon 5770:

Been at this for a couple of hours before I found your solution. This is the ONLY thing that got it going.

Another hang-up: During initial install of Windows 7 64b, it paused for about 10 minutes then told me it couldn't find the drivers. It didn't say for what but I finally guessed it was the Radeon 5770 causing trouble. I downloaded the drivers and put them on a USB stick and restarted the install. It continued on in seconds instead of giving me the long pause. The funny part was, I downloaded the wrong drivers! I couldn't install them when I finally got to the desktop. I had to go find the right ones, but it allowed Windows to finish the install with the generic VGA driver and that got me going.

LASTLY FOLKS: I'm an old DOS guru. You don't need to:

1. do cd.. until you're at c: (cd.. cd.. cd.. cd.. cd.., etc)

The command to do that is:   cd \  <return> 

Unix (terminal), uses a forward slash. DOS uses a backslash.  Some commands are common to the two with the only difference the direction of the slash.

thanks a lot friend! it makes me happy

I know this might have been a long time ago.
If you still have issues.
Open to the location of the BootCamp.msi file. and from the top left click File -> Command Prompt -> Run as Administrator
Then type ".\BootCamp.msi"

Thanks so much.  I could never get my touchpad tap, two finger right click, or right click to work on my 13" Late 2009 Macbook.  They all work now thanks to this!

Worked like a charm thank you!!!!!