Thanks blaaskaak, the zip file is fine now and I've successfully integrated your mod! Me likes!
I have a couple of considerations for future revisions:
1. It would be nice to be given an opportunity, via js popup or form, to enter a "new" name for the topic. This saves you from having to manually edit the first post, which lazy admins like me would really appreciate!
2. When moving/merging threads, have the option of renaming as well. This would be really useful for when you're moving sub-threads that have gone off topic.