ozione, thank you so much! I have it working on 4.1.10 right now. I only have one question, and maybe you can answer it for me.
When I click on the Spoiler BB code icon for the custom title, I get this:
Is there any way to edit something to make the box blank, and remove the "undefined" text? I'm assuming this is something messed up in the original code that isn't compatible with 4.1.10 now?