I wanted to install the Win7 on the M.5 Samsung 951 and I failed I tried this:
http://www.youtube.com/watch?v=No-ct8pQcIg

As this method looks very promising, however it fail to work on Asus Z97-Pro (WiFi ac)/usb 3.1 - with Samsung SM951 M.2 SSD. Rufus easily create the USB boot install Win7 Pro drive, no problemo there. However when I use the recommended bios setup, it ALWAYS reset the computer right after the "Starting Windows" message on screen appears. After that, the Asus board tell me, that it adjusted my bios settings to make the problem "go away" (it re-enable the CSM!) and then the install works, however it did not see single drive (all except M.2 are unpluged)

Latest bios are now used. Asked Asus support and get funny message, that basically says, that Asus only support following M.2 SSD drives it list there: http://www.mediafire.com/?tgzauc1phpnu21w
And the best part of the message is: "Asus do not guarantee functionality of this manboard with other that listed M.2 SSD drives." WTF ...

Any help will be greatly appreciated.

I tried different bios settings regarding the CSM, but the rule seems to be that disabled CSM lead to reboot

The guide is basically about that for the first part of Win install on M.2 SSD drive, you need to:
- completely disable CSM (Boot/CSM)
- select Secure Boot to "Other OS"
- select Key Management to "Clear Secure Bootkeys"

...install Win thru first reboot, then...

Secure Boot: Windows UEFI Mode (instead of completely disabling CSM)
Key Management: Install Default Secure Boot Keys

So it was sound reasonable, however it failed completely

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"It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire