Sorry, I forgot the API question in my obsession with AI. ;)
Not that I have anything helpful to add, as I have no experience with adding a scripting language. I've programmed in a scripting language before, on a MUD. However, there's bound to be a few helpful posts/articles here on GameDev.net. Let me/us know if you find anything particularly well-written?
Alternatively, you could just ask for the help in your actual language. Your helpers might need you to add some querying/setting functions into your existing code, but it shouldn't delay you quite as much as learning and implementing scripting.