update

Installation.md

@@ -0,0 +1,10 @@
+On kali linux 2.0 you just needs the following dependencies :
+#Installation
+```bash
+pip install rpyc
+pip install pefile 
+pip install pycrypto
+pip install yaml
+```
+##Troubleshooting
+If you have some issues with rpyc while running the server on windows, take a look at issue #25, @deathfantasy made a fix 

Writing-a-module.md

@@ -0,0 +1,47 @@
+#Writing a MsgBox module
+First of all write the function/class you want to import on the remote client  
+in the example we create the file pupy/packages/windows/all/pupwinutils/msgbox.py 
+```python
+import ctypes
+import threading
+
+def MessageBox(text, title):
+	t=threading.Thread(target=ctypes.windll.user32.MessageBoxA, args=(None, text, title, 0))
+	t.daemon=True
+	t.start()
+```
+then, simply create a module to load our package and call the function remotely
+```python
+class MsgBoxPopup(PupyModule):
+	""" Pop up a custom message box """
+
+	def init_argparse(self):
+		self.arg_parser = PupyArgumentParser(prog="msgbox", description=self.__doc__)
+		self.arg_parser.add_argument('--title', help='msgbox title')
+		self.arg_parser.add_argument('text', help='text to print in the msgbox :)')
+
+	@windows_only
+	def is_compatible(self):
+		pass
+
+	def run(self, args):
+		self.client.load_package("pupwinutils.msgbox")
+		self.client.conn.modules['pupwinutils.msgbox'].MessageBox(args.text, args.title)
+		self.log("message box popped !")
+
+```
+and that's it, we have a fully functional module :)
+
+```bash
+>> run msgbox -h
+usage: msgbox [-h] [--title TITLE] text
+
+Pop up a custom message box
+
+positional arguments:
+  text           text to print in the msgbox :)
+
+  optional arguments:
+    -h, --help     show this help message and exit
+    --title TITLE  msgbox title
+```