For those of you that have tried this script out over the last few months... Thank You!
Your various experiences have made me realize that this type of text parsing simply does not work well enough to be enjoyable in a game like NWN. So, although I will keep this script on the web just for interest's sake, parsed conversations are out of the game. I might keep the system for a few NPCs that would otherwise say only one-liners, but for all NPCs that have information to divulge, goods to sell or other services to offer, NWN talktrees will have to suffice.