I've found a question for visual script editing software tool for creating game behavior logic, but I am looking for something more flexible. I would like to configure such visual script editing software tool to make it produce code that I need. I use LUA for creating quests in my mmorpg game, but every time there is need of creating a new quest I feel like writing the same code all the time. I'd like to allow my co-workers to do this job in some easy way. The easiest way I can think of would be some sort of making graphs that would represent the quest, and fill all the nodes with different if statements and game texts or procedures like spawning mobs.
Is there any tool that I could use for this purpose?