Yes, your idea is entirely doable, not a bad idea at that.
I replied to another one of your posts, I am curious as to why you can only get to about 40 in 1st gear, I don't seem to have this problem in my gts. What year is your car?
Anyways, the solution is simple: go with a wet nitrous system of some sort, either a multi-port or an injector nozzle adapter type. either way, the system should be a wet system, that is, one that injects N2O and fuel into each cylinder, rather than the type that mist down the Intake
You will need a nitrous controller, Jaccobs, NOS and deadenbear all make excellent controllers, and while a ZEX system may work, it's not as flexible. A Venom VCN 2000 system would probably do the job, and has the computer included in the kit. Summit carries many different Nitrous controllers.
You will also need a WOT switch for the nitrous, no pushbuttons! the system must be engaged at wide open throttle, so your ECU goes into an open loop, if you engage nitrous at partial throttle, you can lean out and engine damage can occur.
You would install the kit as instructed by the manufacturer, install the WOT switch on your throttle body so it trips when the butterfly is wide-open. hook up the controller, and the WOT switch into your system, be sure to add an arming switch in a hidden location, this way, the nitrous can be disabled for daily driving. After all is installed, you only need to set the controller to engage the nitrous at the specified RPM levels, I would use a "progressive" setup, or, in other words, a setting that will gradually increase nitrous flow up to your desired point of cutoff.
if the controller doesn't support cutting off nitrous/fuel at a specific RPM, you can add an RPM switch and a relay to manually switch off the system at a given RPM, use an open-state relay, so if the relay cooks itself, the nitrous will die, rather than it continuing to spray beyond your chosen limits. you can always replace the relay later. If you want to be frugal, just let off the gas a bit at desired RPM to kill the nitrous.
To use the system, you would flip the arming switch, and mash the pedal to the floor, nitrous should engage at your pre-determined point, and gradually increase the fuel/nitrous flow until it reaches it's cutoff point, at which time either your nitrous computer, or the relay & RPM switch will stop they system from flowing nitrous beyond that point.
Definitely keep the jetting around 35 HP, unless you plan on decking the cylinder block and adding some beefier rods & lower compression pistons. BTW, A professional install is worth the money on a job like this.