the installation is simple if you only wish to use it to remove the lag and spool the turbo, a simple nos wet kit will do the trick
your ignition map will need to be specific for nos though in particular low manifold pressure points will need examining as you will now see boost earlier and it is here that your engine may det if it was mapped for a turbo as most are as well as the cylinder pressure increase due to the nos will need to be taken into consideration
You can make the system complex with nos controllers but this is unnecessary just for lag spooling
Multi map ecu's are better but the weber can be hooked up to apply retard using the lead free loom these are set by default at -2-4-8 ecan alter these specifically but the -4 bridge should do
Choke out of the turbine is an issue if you intend to try and add a 100 +nos across the whole rev range
what is your design brief