Install Windows 7 FROM an External DVD USB/FireWare on a iMac 27 i7

Hi all!
I've a iMac 27" i7 and I want install Windows 7 64bit, but I can't use internal super drive (drive failed), I've a usb-sata adapter and a fireware 400/800 sata adapter and a DVD RW sata standar, to solve that trouble i bought a Samsung external DVDRW drive too, but nothing, when I try to boot from one of those drive it fails... I tried to use a macbook pro in target mode by fireware to use it as dvd drive, but nothing, it doesn't goes...
I tried to install rEFI but nothing too
How can I install windows?
Any ideas?
Thanks.
Best regards

Asatoran wrote:
Both, no differences, i tried to boot from a windows xp's install disk on my usb dvd reader, using bootcamp assistant and tring to boot directly, but none...
This would imply that the Windows CD you have may be the problem. Have you tried this disk on another computer. (Boot the other computer with the CD, but cancel the install before it format's your hard drive.) Did this CD come with another computer? Many of those "restore disks" are not bootable and can't be used for other computers. You usually need a retail or volume license copy of Windows. (For legal reasons as well, but we won't get into that now. )
The disk is good and I teste it on another computer and I've burned another CD from my original .iso
It's a standard Windowx XP Pro disck, no upgrade, and I tried with a standard Windowx 7 Home Edition 64Bit and 32Bit, both standard version not upgrade or restore disk
And I donw' want install only windows, I want Snow Leo as primary and a small bootcamp for windows.
Which is why you definitely want to go through Boot Camp Assistant otherwise you risk loosing the Snow Leopard partition.
I know, I've just some year of IT system, but thank's for warning
No, when you are in target mode you can use DVD too, you can try it
Ok, good to know.
Just to summarize my try:
- Standard SATA DVD-RW drive (5" 1/4) connected by SATA->USB
- Standard SATA DVD-RW drive (5" 1/4) connected by SATA->FireWare 400/800
- Samsung external usb DVD-RW drive - http://tinyurl.com/y8vhu29
- USB Flash drive with Windows XP or Windows 7 install software (it goes really well with standard pc)
- Another Mac in Target Mode as DVD reader
- rEFIt - http://refit.sourceforge.net/
I tried it with Windows XP, Windows 7, Ubuntu and Snow Leopard install disk, the only one that goes with ALL methods is Snow Leopard.
From rEFIt website, I found that Mac cannot boot Windows or Linux from an external disk is not well-supported by Apple’s firmware, and for external disk it mean any storage device that is not considered "internal"*, that includes USB Flash drives, SD cards, USB/FireWare DVD/HardDrive, but that is not true for MacBook Air, that it maybe have an EFI firmware without that limitation because haven't an internal drive and because MBA it's the only Mac that can use MBA SuperDrive USB.

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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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How to install Windows 7 from a USB drive!

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http://www.intowindows.com/how-to-install-windows-7vista-from-usb-drive-detailed-100-working-guide/

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