readme changes

README.md

@@ -1,4 +1,22 @@
 Hi, while this "Works" right now, its not well documented; and a lot is subject to change.
 
+## Installing
+The runtime with an example config for twitter can be installed from https://adryd325.github.io/webpackTools/webpackTools.user.js
+
+## Updating
+To update to the latest webpackTools runtime while maintaining your existing config, edit your userscript and replace the string after `const runtime = ` with https://adryd325.github.io/webpackTools/webpackTools.runtime.json. 
+
+## How to determine if something is Webpack 4 or Webpack 5
+TODO: actually explain this
+
+Webpack 5 typically names its jsonp array webpackChunk\<projectName\>
+Webpack 4 typically names its jsonp array webpackJsonp
+
+to double check you can find the first array with 3 entries
+if the 3rd entry is an array with strings, its webpack 4
+if the 3rd entry is a function it's webpack 5
+
+rspack seems to compile to webpack 5 runtime
+
 ## Credits
 A lot of this is based on research by [Mary](https://github.com/mstrodl) and [Cynthia](https://github.com/cynosphere) (HH3), and [Twilight Sparkle](https://github.com/twilight-sparkle-irl/) (webcrack, crispr)