Okay, time to get around to answering the questions that have been gathering dust in the askbox for the past couple of weeks IM REALLY SORRY I DONT CHECK TUMBLR ENOUGH PLEASE FORGIVE ME.
So when i’m editing all i do is open the .ks script files in notepad. It’s that easy. No other extension wrangling required. To make patches, there’s an easy guide for that on TL Wiki, just here: http://tlwiki.org/index.php?title=Kirikiri2_for_Translators
Most games put out by UGCP use the Kirikiri engine, which is very easy to extract, edit and repack. Hope this helps!