diff --git a/README.md b/README.md
index 2739a37..762c852 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,15 @@
-Decrypt
-=======
+# Decrypt
 
 Decrypt saved config data from some Sphairon routers (such as the Alice IAD 3232 or similar models) on Mac OS X.
+
+Thanks to [hph][1] for reverse engineering the details of that config format.
+
+## Compile:
+
+	clang Decrypt.c -o Decrypt
+
+## Run:
+
+	Decrypt path/to/config.bin path/to/output.tgz
+
+[1]: http://hph.name/207