Fogger systems are $$$. And of a power range that would require you to run with timing backed off. Wouldn't be practical for a "streetable application". Also with a Gen5/N*TB/etc already in the mix, a fogger system is gonna make something say Snap.
I'd say use a jet threaded into a TB spacer plate but compressing a nitrous/fuel mixture in a */C seems to me to be in the "here'* your sign" category. But don't know squat about that realm.
Dry shots are wack. They gave NOX the bad name that carries on. You have to provide gas for the extra oxidizer or your going to run beyond efficient and lean the mix to far.