Heya, this is SUPER OVERDUE but I wanted to share it with yall anyway.
About a year ago I made a little web-based tool which can help you create intricate text boxes for chatting with other players. All of the various slash-commands, things like that. Well I FINALLY uploaded it to my website, feel free to take a look!
It's not perfect, but I'd like to make updates to it anyway -- especially in case NGS does things differently (I actually haven't played NGS yet)
At any rate, I hope you find it to be convenient and easy to use.