diff --git a/README.md b/README.md
index b747630..e5c5be5 100644
--- a/README.md
+++ b/README.md
@@ -24,59 +24,79 @@ If it doesn't work, please leave an issue together with your phone/OS/wechat ver
 + numpy
 + python-csscompressor (suggested, optional)
 + adb and rooted android phone connected to a Linux/Mac OS.
-+ Silk audio decoder (just run `./third-party/compile_silk.sh`)
++ Silk audio decoder (included; just run `./third-party/compile_silk.sh`)
 + gnu-sed
 
 #### Get Necessary Data:
 
-+ Get decrypted WeChat database (Linux & Mac Only):
+Note that commands involving `./android-interact.sh` are meant to be run on the computer.
+
++ (Requires Linux or Mac) Get the decrypted WeChat database and the avatar index:
 	+ Automatic: `./android-interact.sh db-decrypt`
-		+ Requires rooted adb. Available at https://play.google.com/store/apps/details?id=eu.chainfire.adbd&hl=en
+		+ Requires rooted adb. If the OS distribution does not come with adb support, you can download an app such as https://play.google.com/store/apps/details?id=eu.chainfire.adbd
 	+ Manual:
-		+ Get /data/data/com.tencent.mm/MicroMsg/long-long-name/{EnMicroMsg.db,sfs/avatar.index} from __root__ filesystem, possible ways are:
+		+ Figure out your `${userid}` by inspecting the contents of `/data/data/com.tencent.mm/MicroMsg` on the __root__ filesystem of the device. It should be a 32-character-long name consisting of hexadecimal digits.
+		+ Get `/data/data/com.tencent.mm/MicroMsg/${userid}/{EnMicroMsg.db,sfs/avatar.index}` from the device, possible ways are:
 			+ `./android-interact.sh db`
 			+ Use your rooted file system manager app
-		+ Get WeChat uin, possible ways are:
-			+ `./android-interact.sh uin`
+		+ Get WeChat uin (an integer), possible ways are:
+			+ `./android-interact.sh uin`, which pulls the value from `/data/data/com.tencent.mm/shared_prefs/system_config_prefs.xml`
 			+ Login to [web wechat](https://wx.qq.com), get wxuin=1234567 from `document.cookie`
-		+ Get your phone IMEI number, possible ways are:
+		+ Get your phone IMEI number (a positive integer), possible ways are:
 			+ `./android-interact.sh imei`
 			+ Call `*#06#` on your phone
 			+ Find IMEI in system settings
 		+ Decrypt database, will produce `decrypted.db`:
-		```
-		./decrypt-db.py <path to EnMicroMsg.db> <imei> <uin>
-		```
+
+            ```
+            ./decrypt-db.py <path to EnMicroMsg.db> <imei> <uin>
+            ```
 
 
-NOTE: you may need to try different ways to getting imei & uin,
-because things behave differently on different phones.
+    NOTE: you may need to try different ways to getting imei & uin,
+    because things behave differently on different phones.
 
-Also, if the decryption doesn't work with pysqlcipher, maybe try the version of sqlcipher in `legacy`.
+    Also, if the decryption doesn't work with pysqlcipher, maybe try the version of sqlcipher in `legacy`.
 
 
-+ Get WeChat user resource directory from your phone to `resource` directory:
++ Copy the WeChat user resource directory `/mnt/sdcard/tencent/MicroMsg/${userid}/{emoji,image2,sfs,video,voice2}` from the phone's SD card to the `resource` directory:
 	+ `./android-interact.sh res`
-	+ You might need to change the resource location in this script if the default doesn't work
-	+ This takes a __long__ time.
+	+ You might need to tweak `RES_DIR` in the script if the default doesn't work
+	+ This can take a __long__ time. Some ways to do this faster:
+        + If there's enough free space on the SD card, you can combine all the files via `busybox tar` without compression in the `adb shell`, use `adb pull` to copy the `tar` archive to the computer, and then extract it. BusyBox is needed as the Android system's `tar` may choke on long paths.
+        + Alternatively, you can use pipes.  This is slower, but doesn't require any free space on the SD card:
+
+            ```sh
+            # copy MicroMsg to the current directory
+            adb shell 'cd /mnt/sdcard/tencent &&
+                       busybox tar czf - MicroMsg 2>/dev/null | busybox base64' |
+                base64 -di | tar xzf -
+            ```
 
 #### Run:
-+ Parse and dump text messages of __every__ chat (resource directory is not needed to run this):
-```
-./dump-msg.py decrypted.db output_dir
-```
-+ List all chats:
-```
-./list-chats.py decrypted.db
-```
-+ Generate statistical report on text messages:
-```
-./count-message.sh output_dir
-```
-+ Dump messages of one contact to html, containing voice messages, emojis, and images:
-```
-./dump-html.py decrypted.db avatar.index resource <contact name> output.html
-```
++ Parse and dump text messages of __every__ chat (requires `decrypted.db`):
+
+    ```
+    ./dump-msg.py decrypted.db output_dir
+    ```
+
++ List all chats (requires `decrypted.db`):
+
+    ```
+    ./list-chats.py decrypted.db
+    ```
+
++ Generate statistical report on text messages (requires `output_dir` from `./dump-msg.py`):
+
+    ```
+    ./count-message.sh output_dir
+    ```
+
++ Dump messages of one contact to html, containing voice messages, emojis, and images (requires `decrypted.db`, `avatar.index`, and `resource`):
+
+    ```
+    ./dump-html.py decrypted.db avatar.index resource "<contact_name>" output.html
+    ```
 
 ### Examples:
 See [here](http://ppwwyyxx.com/static/wechat/example.html) for an example html.