You can upload Nl2 scripts to the exchange.
Since I don't have NL2 (if you're wondering why, I can't afford it) I don't know the file extension they use so stick them in a zip file and pick "NL2 - Script" from the track styles selection.
For any other suggestions, please post them in the Feedback and Suggestions forum as I check that one couple times a day versus other forums.
Thanks,
Oscar