People have asked me to package the Bochs IA-32 PC emulator that I used for running Windows NT 4.0, and today I’ve done it. It is available from the Fremantle extras-devel repository: http://maemo.org/packages/view/bochs/
I have configured the package in the way that I found works best on the N900 and included a sample config file that works for running NT 4.0, as a starting point for others. Also the version is 2.3.7 and not the latest, since in my experience 2.3.7 was the most stable on the N900 – this might of course change or have already changed.
See also the Bochs project web page for more info on Bochs in general: http://bochs.sourceforge.net/