Tested build process on windows.

Updated README, and fixed build.bat, so windows build
of i2psam.jar works.

apps/sam/jython/build/README

@@ -11,17 +11,47 @@ You will need:
 
 Note that you don't need python to build the SAM server
 
+IMPORTANT - when installing jython, and run java on jython_n.n.class,
+make sure you run the java.exe that's in your SDK, not the one in your
+JRE.
+
+---------------------------------------------------------
+
 2) Preparation
 
 Edit the Makefile, and set JYTHONJAR to where your jython.jar lives
-Or, if on windows, edit build.bat and set the first field of CLASSPATH
-to where jython.jar lives
+
+Don't worry about this if your're on windows
+
+----------------------------------------------------------
 
 3) Building
 
-To build i2psam.jar, simply type 'make'.
-or if on Windows, type 'build.bat'
+To build i2psam.jar on regular *nix OSs, simply type 'make'.
+
+To build i2psam.jar on Windows, type 'build.bat'
+
+----------------------------------------------------------
 
 4) Installing
 
-Copy i2psam.jar to wherever the jar files live on your i2p installation
+Copy i2psam.jar to wherever the jar files live on your i2p installation,
+usually <i2pbasedir>/lib
+
+Find jython.jar, and copy it there too
+
+----------------------------------------------------------
+
+5) Running
+
+(assuming that you're putting the start script into your main i2p
+runtime directory, where the I2P jars live in a 'lib' subdirectory)
+
+You will need to launch i2psam.jar with a command like:
+
+ java -cp lib/jython.jar:lib/i2p.jar:lib/mstreaming.jar:lib/i2psam.jar i2psam
+
+or on windows,
+
+ java -cp lib\jython.jar;lib\i2p.jar;lib\mstreaming.jar;lib\i2psam.jar i2psam
+