I've been working for a while now on a web-based editor for programmed/solo adventures called Dmorte. It's ready to try now if anyone is looking for a tool to help them build such things. It can also be used for pick-your-path books. It lets you visually lay out the flow of your adventure and connect up the paragraphs. It will also generate the finished random text of the whole adventure with numbered paragraphs. You can try it out here:
http://shadekeep.com/dmorte.html
It's a bit complex, so hopefully the documentation will help. I'll probably also create a walkthru video at some point showing the basics of how to build your own adventure. The program starts with a demo adventure that you can study and tinker with as well, to help learn the program. Let me know if you have any questions about it.