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+Installing Programs with setup.rb
+=================================
+    
+Quick Start
+-----------
+    
+  Type this (You might needs super user previledge):
+
+      ($ su)
+       # ruby setup.rb
+
+  If you want to install a program in to your home directory
+  ($HOME), use following instead:
+
+      $ ruby setup.rb all --prefix=$HOME
+
+    
+Detailed Installtion Process
+----------------------------
+    
+  setup.rb invokes installation by three steps.  There are
+  "config", "setup" and "install".  You can invoke each steps
+  separately as following:
+
+      $ ruby setup.rb config
+      $ ruby setup.rb setup
+      # ruby setup.rb install
+
+  You can controll installation process by giving detailed
+  options for each tasks.  For example, --bin-dir=$HOME/bin
+  let setup.rb install commands in $HOME/bin.
+    
+  For details, see "Task Options".
+    
+  Global Options
+  --------------
+    
+  "Global Option" is a command line option which you can use
+  for all tasks.  You must give a global option before any task
+  name.
+    
+    -q,--quiet
+        suppress message outputs
+    --verbose
+        output messages verbosely (default)
+    -h,--help
+        prints help and quit
+    -v,--version
+        prints version and quit
+    --copyright
+        prints copyright and quit
+    
+Tasks
+-----
+  These are acceptable tasks:
+    all
+        Invokes `config', `setup', then `install'.
+        Task options for all is same with config.
+    config
+        Checks and saves configurations.
+    show
+        Prints current configurations.
+    setup
+        Compiles ruby extentions.
+    install
+        Installs files.
+    clean
+        Removes created files.
+    distclean
+        Removes all created files.
+    
+  Task Options for CONFIG/ALL
+  ---------------------------
+    
+    --prefix=PATH
+        a prefix of the installing directory path
+    --stdruby=PATH
+        the directory for standard ruby libraries
+    --siterubycommon=PATH
+        the directory for version-independent non-standard
+        ruby libraries
+    --siteruby=PATH
+        the directory for non-standard ruby libraries
+    --bindir=PATH
+        the directory for commands
+    --rbdir=PATH
+        the directory for ruby scripts
+    --sodir=PATH
+        the directory for ruby extentions
+    --datadir=PATH
+        the directory for shared data
+    --rubypath=PATH
+        path to set to #! line
+    --rubyprog=PATH
+        the ruby program using for installation
+    --makeprog=NAME
+        the make program to compile ruby extentions
+    --without-ext
+        forces to setup.rb never to compile/install
+        ruby extentions.
+    --rbconfig=PATH
+        your rbconfig.rb to load
+    
+  You can view default values of these options by typing
+
+      $ ruby setup.rb --help
+
+    
+  If there's the directory named "packages",
+  You can also use these options:
+    --with=NAME,NAME,NAME...
+        Package names which you want to install.
+    --without=NAME,NAME,NAME...
+        Package names which you do not want to install.
+    
+  [NOTE] You can pass options for extconf.rb like this:
+
+      ruby setup.rb config -- --with-tklib=/usr/lib/libtk-ja.so.8.0
+
+    
+  Task Options for INSTALL
+  ------------------------
+    
+    --no-harm
+        prints what to do and done nothing really.
+    --prefix=PATH
+        The prefix of the installing directory path.
+        This option may help binary package maintainers.
+        A default value is an empty string.