Update readme for modding w/ backwords compatibility

README.md

@@ -1,10 +1,14 @@
-# almost entire weeks.lua needs to be rewritten to support the new FNF charts.
-
 # DOWNLOAD NIGHTLY HERE: https://nightly.link/VanillaEngineDevs/Vanilla-Engine/workflows/build/main
 
 # ![Logo](images/logo.png)
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+# FOR MODDING, READ HERE
+Vanilla Engine has recently been updated to support the new FNF 0.3.x charts. For backwords compatibility for Charts, Inst, and Vocals, do the following:
+1. In your week file, instead of weeks:generateNotes(chartfile, metafile, difficulty), call weeks:legacyGenerateNotes(chartfile)
+2. Only load the vocals for "VoicesBF". This is because VE now uses the FNNF 0.3.x Vocals system (split-vocal files).
+
+
 Friday Night Funkin' Vanilla Engine is a rewrite of [Friday Night Funkin'](https://ninja-muffin24.itch.io/funkin) built on [LÖVE](https://love2d.org/) for Windows and using [Funkin' Rewritten](https://github.com/HTV04/Funkin-Rewritten) for macOS, Linux, and Web platforms, as well as previously unsupported platforms, like the Nintendo Switch!
 
 Friday Night Funkin' Rewritten features: