diff --git a/doc/Development.md b/doc/Development.md
new file mode 100644
index 000000000..c91ecd5d9
--- /dev/null
+++ b/doc/Development.md
@@ -0,0 +1,36 @@
+# Development
+
+Developement is currently coordinated by Steffen Vogel <stvogel@eonerc.rwth-aachen.de> using [GitHub](http://github.com/RWTH-ACS/S2SS).
+Please feel free to submit pull requests or bug reports.
+
+## Extensibilty
+
+There are two main places where S2SS can easily extended:
+
+#### New node-type
+
+    REGISTER_NODE_TYPE(struct node_type *vt)
+
+#### New hook functions
+
+    /** The type of a hook defines when a hook will be exectuted. This is used as a bitmask. */
+    enum hook_type {
+    	HOOK_PATH_START		= 1 << 0, /**< Called whenever a path is started; before threads are created. */
+	
+	[...]
+	
+    	HOOK_ASYNC		= 1 << 6, /**< Called asynchronously with fixed rate (see path::rate). */
+	
+    	HOOK_PERIODIC		= 1 << 7, /**< Called periodically. Period is set by global 'stats' option in the configuration file. */
+	
+    	/** @{ Classes of hooks */
+    	/** Internal hooks are mandatory. */
+    	HOOK_INTERNAL		= 1 << 16,
+    	/** All hooks */
+    	HOOK_ALL		= HOOK_INTERNAL - 1
+    	/** @} */
+    };
+    
+    typedef int (*hook_cb_t)(struct path *p, struct hook *h, int when);
+    
+    REGISTER_HOOK(char *name, int priority, hook_cb_t cb, enum hook_type when)
diff --git a/doc/Install.md b/doc/Install.md
index 74bb89f4c..f94db3baf 100644
--- a/doc/Install.md
+++ b/doc/Install.md
@@ -29,7 +29,7 @@ Checkout the `Makefile` and `include/config.h` for some options which have to be
 
 Afterwards, start the compilation with:
 
-	$ make
+    $ make
 
 Append `V=5` to `make` for a more verbose debugging output.
 Append `DEBUG=1` to `make` to add debug symbols.
@@ -38,7 +38,7 @@ Append `DEBUG=1` to `make` to add debug symbols.
 
 Install the files to your search path:
 
-	$ make install
+    $ make install
 
 Append `PREFIX=/opt/local` to change the installation destination.
 
@@ -46,6 +46,6 @@ Append `PREFIX=/opt/local` to change the installation destination.
 
 Verify everything is working and required node-types are compiled-in:
 
-	$ s2ss server
+    $ s2ss server
 
 Will show you the current version of the server including a list of all supported node-types.