By "poker script" you must mean a poker bot, which in that case I have looked around and there is no pre-made bot coded and ready to go for nitrogen. This is because nitrogen is an extremely small room in relation to other poker rooms.
There is most definitely bots on their tables I see them all the time, but those bot owners probably are not interested in selling their bot.
I have been playing around with open source bots for bigger rooms but what I have found is that creating a bot takes weeks/months of trial and error and due diligence, but I can imagine you could use
https://github.com/OpenHoldem/openholdembot to make your own bot for nitrogen.
You could maybe try posting in services board offering that $100 to anyone who can code you up a simple bot to use on there, or even try fiverr.com or something but chances are you will get a poorly playing bot.
Good luck man, nitrogen is a pretty nice room for poker (in terms of BTC) and if you grind it out you can make a nice chunk of coin on there.