diff --git a/README.md b/README.md
index 59f7279365..ff87bc06b7 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,21 @@
 # cutthecord
 
-Discord Android app patches
\ No newline at end of file
+Discord Android app patches
+
+## Toolchain setup
+
+- Get apktool
+- Get a keystore, see [here](https://stackoverflow.com/a/14994354/3286892), step 1.
+- Get 72x72 copies of latest version of mutant standard emojis with codepoints. I have a zip [here](https://mutant.lavatech.top/72x72.zip).
+- Extract the emojis you got somewhere, then prepend `emoji_` to their names (`for f in * ; do mv -- "$f" "emoji_$f" ; done`).
+- Get rid of `-fe0f` on filenames to fix render of some emojis (`find . -name '*png' -exec bash -c ' mv $0 ${0/-fe0f/}' {} \;`).
+- Clone this repo somewhere, edit `emojireplace.sh` and set the variables to the folders you want it to run on.
+
+## Building an patched discord app
+
+- Get a Discord apk (*cough* [aptoide](https://ws75.aptoide.com/api/7/app/getMeta?package_name=com.discord)), and get the patches you want for that version. If the patches aren't available, you'll have to port them yourself.
+- Apply the patches you want
+- Edit `emojireplace.sh` to point to right directories, and apply emoji patches (`bash emojireplace.sh`)
+- Build the new APK (`apktool b com.discord-831`)
+- Sign the new APK (`jarsigner -keystore <keystore path> <foldername>/dist/<foldername>.apk <alias>`)
+- Get your new APK from `<foldername>/dist/<foldername>.apk`, install and enjoy!
diff --git a/emojireplace.sh b/emojireplace.sh
new file mode 100644
index 0000000000..1f0a4dcd54
--- /dev/null
+++ b/emojireplace.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+EXTRACTED_DISCORD="/home/ave/Downloads/dic/com.discord-830"
+EXTRACTED_MUTSTD="/home/ave/Downloads/emojo/72x72"
+for filename in $EXTRACTED_DISCORD/res/raw/*.png; do
+    basefilename=$(basename $filename)
+    if [ -f $EXTRACTED_MUTSTD/$basefilename ]; then
+        echo "$basefilename replaced"
+        \cp $EXTRACTED_MUTSTD/$basefilename $filename
+    fi
+done