Update README with current state, and some quick start pointers

README

@@ -2,9 +2,37 @@ This repository consists of a number of tools and utilities for examining and
 modifying Thinkpad Embedded Controller firmware.
 
 Including:
-*   partial x220 disassembly radare project
-*   partial x230 disassembly radare project
+*   radare projects with partial disassembly of several thinkpads
 *   scripts for downloading the ISO image and extracting the firmware
 *   script for patching the firmware
-*   documentation on the tables found in the firmware
+*   documentation on the tables found in the firmware (TODO)
+
+Quick Start:
+
+    To fetch the firmware from Lenovo, extract, decrypt and patch
+    it, ready for more patching, choose one of:
+
+        make x230.G2HT35WW.img
+        make t430s.G7HT39WW.img
+
+    To update the checksums and encrypt the patched firmware, ready to
+    be inserted into the FL2 file, choose one of:
+
+        make x230.G2HT35WW.img.enc
+        make t430s.G7HT39WW.img.enc
+
+    To re-insert the EC firmware into the bios flash file, use a command
+    similar to the following:
+
+        dd if=x230.G2HT35WW.img.enc of=\$01D3000.FL2 conv=notrunc bs=4096 seek=1280
+
+    To update your firmware, prepare a DOS boot disk with the FL2 file and
+    the dosflash.exe utility and then use a command similar to:
+
+        dosflash /sd /ipf ec /file $01D3000.FL2
+
+References:
+    http://forum.thinkpads.com/viewtopic.php?f=69&t=120776
+    http://www.thinkwiki.org/wiki/Install_Classic_Keyboard_on_xx30_Series_ThinkPads#Experimental_X230_Embedded_Controller_Mod
+    http://www.zmatt.net/unlocking-my-lenovo-laptop-part-3/