I would expect lillfiluren to fix this one as well. He has a script that aims to solve the Delorme challenges. But many of them have two problems:
Special rules that makes them differ from others, like "no events", or "may not use the same cache twice when pages are overlapping". Things like that makes it complicated and a lot more work.
Most of them do not have any polygon data. There is no delorme-book into the Project-GC-servers, so that issue has to be solved as well in some way.
But I would expect this to be solved with time, but there probably are a few hours of work per Delorme challenge that has special rules.