I posted a Q about how to set btime (BSD's file Birth time) on files. I'm wondering if the community here thinkgs this might be a better fit here. No one has close voted over on Unix, but I don't want to just cross post it here :)
Thanks for asking, and for avoiding a cross-post.
Generally the question seems to be on-topic on both sites (at least as long as you are looking for end user solutions and don't want to develop your own piece of code). So if you don't get an answer on the Unix site, please flag it and have a moderator over there migrate it to AD.
PS: And yes, seems like you've already found the two questions relating to the topic :-)