This script charms me, since I am, even as we speak, going for the Wossname on my current Bad Moon run.
I took BDrag0n's script, refactored it, and made it tell you when it stops early because it reached the end picture.
Untested - although ASH "verified" it for me - since I'm done with my turns for the day.
I'll try it tomorrow.
If you try it before then, tell me how it works.
Edit: OK, I improved it a bit. You can now run it and ask for 0 turns, if all you're interested in is seeing what your current progress is. I removed the old script and attached the new one. I hope that works.