So I've been doing some minor changes with StopThePed questions (both traffic stops and general ped questioning) using xml editor software. It's fairly simple to do (took only a little research on how to make/write xml) most can be done from copy paste existing question tree/answers then edit it.
So for example I've added a ped question: "Why are you carrying a concealed weapon without the correct licence?"
Possible Answers: "Because i want too" or "Self protection" or "It's mine, I do what i want with it"
I've also added extra citations and a charges using the same procedure in CompuLite (xml editor)
Think you or anyone else interested should give that a go first before looking deeper into creating your own plugin. It's helped me personally understand the basics of the layout needed.