updated readme

Author: kaijia2022

README.md

@@ -1,3 +1,20 @@
 # cheatengine-extended-sdk
 
-Download the cheat engine executables with customized sdk in the release folder.
+The only differnce between this version and [cheat engine 7.5](https://github.com/cheat-engine/cheat-engine) from the master branch is an extra export function for `isWow64Process` in `plugin.pas`. 
+
+# Build
+
+Lazarus IDE, see [cheat engine 7.5](https://github.com/cheat-engine/cheat-engine)
+
+
+# Usage
+- If you just want to use [DMA plugin](https://github.com/kaijia2022/Cheat-Engine-DMA-Plugin/) with cheat engine 7.5:
+    -   Download the cheat engine executables with customized sdk in the release folder.
+
+- For future user who want to use the latest version from the master branch:
+    - Clone [cheat engine](https://github.com/cheat-engine/cheat-engine) source code from master branch
+    - Copy [`plugin.pas`](https://github.com/kaijia2022/cheatengine-extended-sdk/blob/main/Cheat%20Engine/plugin.pas) 
+    - replace `plugin.pas` in the source code you just cloned.
+    - Build the cheat engine with lazarus IDE.
+
+