There is a small typo on turn-based events (3. Copy this turnscript and type into your game code. Insert it at the end, just before the last line (which will be "</asl>")). I would have fixed it myself but I don't have a wiki account yet.
In Ask a question it says changing the prompt is really only possible if you're using Quest offline. Do you mean the IDE, or playing the game offline? Might be good to clarify.