there is some info on this site about nitrous, you just have to search. but therre is alot more info on Clubrsx.com about nitrous.
i have never used nitrous myself but what i have read the best set up for occasional street/track use is a dry set up (sprays nitrous only). you need to get bigger injectors and a fuel pump. if you bought a wet kit (sprays fuel and nitrous together) you can sell the fuel setup part of the kit and that should help you pay for the pump and injectors.
the dry set up is better when used with kpro b/c instead of just choosing a fuel pill to match your nitrous shot, you have kpro add the exact correct amount of fuel. which will make more hp. you will need to have this tuned. "do not spray till you tuner says ok"
when setup correctly, you can flip one switch, floor it and kpro will take care of the rest. the best part is you can drive around on our normal n/a tune and when your ready flip the switch and kpro changes maps automatically.