You may be able to copy that DLL from a real Windows installation. The Wine developers haven't yet created alternative versions for all Windows DLLs, so some of them still need to be borrowed from the real thing. If you can get your hands on libnt.dll from a real Windows install (or from the web somewhere), put it in your fake-Windows /system/ directory (if you have one - or in your real Windows directory, if that's what you have). That oughta fix the problem
