As with everyone else - it cannot be done. Wrong firmware/bootloader.
NT for PowerPC was very short-lived, introduced in NT 3.5, discontinued with NT 4.0 SP3. I have it running on my PowerPC ThinkPad, but there just isn't any useful software for it.
One nice bonus, it does run 16-bit x86 software via emulation, appearing completely native. So I do have Microsoft Office 4.1.2 and Internet Explorer 5 running on mine. (The Windows 3.1 version of IE5, not the Windows NT/95 version of IE5.)
Similarly, Mac OS doesn't run on my PowerPC ThinkPad - just the wrong bootloader for Mac OS.