I would also want to replace the credits and template files with the new ones in the zip to make sures things are 100% up to date
It would just be simpler to download the installer and run it. Nifflas and I had a conversation about this once, and the installer just updates KS and things the need updating, without removing any levels...
Then again I believe the only installer was found on the old forum, in the KS topic, and I can't quite remember if it was 1.2, or 1.2.1