I actually worked on this yesterday, and I'm probably going to use XP Embedded instead, because
a) I surprisingly actually have a runtime license for it, so you don't have to sit through the FBA preparing the OS to avoid the evaluation time bomb
b) compiling software for XP is much easier than compiling software for NT 4
(The embedded versions have two licenses, one for the tooling, which I have access to through work's Visual Studio subscription, and the runtime one, which is supposed to be specific to a product, and thus requires you to buy it separately - the runtime serial can be dumped from any image, so you can just get it from a thin client of the appropriate era)
or how adding Notepad adds Internet Explorer
(Notepad pulls in the rest of the accessories like Paint, which pulls in the Help renderer, which pulls in MSHTML, which pulls in Internet Explorer)
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