You need a wet kit. A wet kit has 2 lines that spray into the intake, one nitrous and one fuel. The 95 Eclipses use a dry kit. A 50-60 shot is relatively safe. I use a 70 shot and haven't had any problem, just don't use it everyday... stick to weekend racing. The Nitrous system is armed via a switch. Another switch is placed on your throttle body and sprays the nitrous at WOT. It sprays as long as you are at WOT, usually 10-15 seconds.
Here's basically how it's set up- Run a line from the nitrous bottle to the nitrous solenoid. Run a line from the fuel system to the fuel solenoid. Install all electrical components and switches. When activated, the two solenoids open and spray Fuel and Nitrous into the intake.