It's been mentioned earlier in my 3rd reply on the thread thread that it can be run mid-way, and it doesn't affect anything.
In any case there is the readme file to look at. If you want to you can try it out, but it is still a little.. "unclean", so to speak. The new one I have is much better, and not only are the party members permanently protected, the Maze no longer shows irritating Maze graphics - the NPCs just disappear almost instantly when combat begins.
However, for some reason when I enter a new Area the Maze does not occur for quite a while. This means my party members lie around distracting the enemies (they won't die, though), which makes it a LOT easier than a pure Solo. To resolve this, saving game after you enter an area and Loading that Saved Game will make the Maze work quickly and effectively.
If you want to I can upload what I already have and post a link here, you'll probably find it better than my v1 Party Solo.