Any thoughts on how to use this to add a "passenger" crew replacer? I'm essentially just looking for a way to have a stack count against the personnel count of fleet, but not get counted for raids, colonization, etc.
i am somewhat unsure what you mean.
if you are talking about adding new 'crew' to the 'crew storage' of a fleet, I have no clue how that works, but crew replacer could likely work with it if I know how.
if you are talking about having 'crew' to crew your ships, I also don't know how that works, but crew replacer could also get that to work if I knew how.
you also mention not having a crew type count for raids and colonization (colonization is also not yet supported.). getting a 'crew' to not do a job is very simple task, as every job has its own set of 'crew' that is allowed to do said job, to allow for a lot of flexibility in deciding what a crew can do and how good at it they are. in effect, how you do this is you only add your 'crew' to jobs you want them to do.
for real though, I don't quite understand what you are asking. would you be willing to elaborate?
(also if you do happen to have any ideas at all how to do things like change the number of crew storage that is used in a fleets crew storage, or the number of available crew for ships in a fleet, I would be very grateful if you shared so I could add that to crew replacer)