Help Porting a Sony WIdget to Trebuchet topic

So the widget I'm trying to install is the Sony WeatherWidget.apk. It seems that it will run on my device, but only if I have the Xperia Home Launcher running. I'd like to get it running with Trebuchet, however, not Xperia Home.

Does anyone know which files I need to replace inside the APK to get Trebuchet to recognize it as a widget? Is it the signature, the resources.arsc, the classes.dex, or the AndroidManifest.xml?