Interesting idea, I hadn't thought about ReactOS as a possible source of FOSS programs for windows - but why not? We run Gnu user land various places after all.
Curious about why it crashes. Did you build from source?
Or it could be because of the compatibility: XP's explorer doesn't run on 10, so we shouldn't expect its clone to run either! But I had to try :)
Still, considering it's open source and the closest thing what I do want, starting with this and stripping out the taskbar might get me a good result.
Same with MSPaint: just spent several days trying to get the leaked XP MSPaint to compile, to no avail. Looks like I'd have better luck starting with ReactOS's paint clone and modifying it so it's feature complete and has the original icons :)