diff --git a/.gitignore b/.gitignore
index 1faa701..e32c88e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.redcar
 Gemfile.lock
 doc
 pkg
diff --git a/lib/helium.rb b/lib/helium.rb
index 18f525c..dcc10e1 100644
--- a/lib/helium.rb
+++ b/lib/helium.rb
@@ -7,7 +7,6 @@
 require 'grit'
 require 'jake'
 require 'packr'
-require 'oyster'
 
 module Helium
   
@@ -37,9 +36,12 @@ module Helium
   
   ERB_TRIM_MODE = '-'
   
-  %w[trie configurable deployer generator logger].each do |file|
-    require File.join(ROOT, 'helium', file)
-  end
+  autoload :Configurable, File.join(ROOT, 'helium', 'configurable')
+  autoload :Deployer,     File.join(ROOT, 'helium', 'deployer')
+  autoload :Generator,    File.join(ROOT, 'helium', 'generator')
+  autoload :Logger,       File.join(ROOT, 'helium', 'logger')
+  autoload :Trie,         File.join(ROOT, 'helium', 'trie')
+  autoload :Web,          File.join(ROOT, 'helium', 'web')
   
   def self.generate(template, dir, options = {})
     Generator.new(template, dir, options).run!
diff --git a/lib/helium/web.rb b/lib/helium/web.rb
index 0643da2..2a71aef 100644
--- a/lib/helium/web.rb
+++ b/lib/helium/web.rb
@@ -4,26 +4,22 @@
 
 module Helium
   class Web < Sinatra::Base
-    
+    extend Configurable
     
     ROOT_DIR = File.expand_path(File.dirname(__FILE__))
-    require File.join(ROOT_DIR, '..', 'helium')
     require File.join(ROOT_DIR, 'web_helpers')
     
-    extend Configurable
-    
-    LIB_DIR  = 'lib'
-    
-    CONFIG   = File.join(APP_DIR, 'deploy.yml')
-    CUSTOM   = File.join(APP_DIR, 'custom.js')
-    PUBLIC   = File.join(APP_DIR, 'public', WEB_ROOT)
-    LOCK     = File.join(APP_DIR, '.lock')
+    CONFIG  = 'deploy.yml'
+    CUSTOM  = 'custom.js'
+    LIB_DIR = 'lib'
+    LOCK    = '.lock'
+    PUBLIC  = File.join('public', WEB_ROOT)
     
     set :static, true
-    set :public, File.join(APP_DIR, 'public')
     set :views, File.join(ROOT_DIR, 'views')
     
     before do
+      self.class.set :public, File.join(app_directory, 'public')
       @projects = project_config
       @location = get_location
     end
@@ -48,7 +44,7 @@ class Web < Sinatra::Base
       halt(200, erb(:deploy)) if @error
       
       with_lock do
-        deployer = Helium::Deployer.new(APP_DIR, LIB_DIR)
+        deployer = Helium::Deployer.new(app_directory, LIB_DIR)
         logger   = Helium::Logger.new
         deployer.add_observer(logger)
         
@@ -59,18 +55,21 @@ class Web < Sinatra::Base
         
         deployer.cleanup!
         
-        custom = File.file?(CUSTOM) ? File.read(CUSTOM) : nil
+        custom_path = File.join(app_directory, CUSTOM)
+        public_path = File.join(app_directory, PUBLIC)
+        
+        custom = File.file?(custom_path) ? File.read(custom_path) : nil
         files = deployer.run_builds!(:custom => custom, :location => @location)
         
-        FileUtils.rm_rf(PUBLIC) if File.exists?(PUBLIC)
+        FileUtils.rm_rf(public_path) if File.exists?(public_path)
         
         files.each do |path|
-          source, dest = File.join(deployer.static_dir, path), File.join(PUBLIC, path)
+          source, dest = File.join(deployer.static_dir, path), File.join(public_path, path)
           FileUtils.mkdir_p(File.dirname(dest))
           FileUtils.cp(source, dest)
         end
         
-        @log = logger.messages.map { |msg| msg.sub(File.join(APP_DIR, LIB_DIR), '') }
+        @log = logger.messages.map { |msg| msg.sub(File.join(app_directory, LIB_DIR), '') }
         erb :deploy
       end
     end
@@ -80,7 +79,7 @@ class Web < Sinatra::Base
     ## Save changes to the configuration file, making sure it validates as YAML.
     post '/app/config' do
       @action   = 'config'
-      @file     = CONFIG
+      @file     = File.join(app_directory, CONFIG)
       @contents = params[:contents]
       if allow_write_access?(env)
         begin
@@ -102,7 +101,7 @@ class Web < Sinatra::Base
     ## Save changes to the custom loaders file.
     post '/app/custom' do
       @action   = 'custom'
-      @file     = CUSTOM
+      @file     = File.join(app_directory, CUSTOM)
       @contents = params[:contents]
       if allow_write_access?(env)
         File.open(@file, 'w') { |f| f.write(@contents) }
diff --git a/lib/helium/web_helpers.rb b/lib/helium/web_helpers.rb
index 3122847..d6bc7c2 100644
--- a/lib/helium/web_helpers.rb
+++ b/lib/helium/web_helpers.rb
@@ -4,12 +4,14 @@ class Web
     helpers do
       # Returns the data structure contained in the app's deploy.yml file.
       def project_config
-        Helium::Deployer.new(File.dirname(CONFIG)).projects
+        config = File.join(app_directory, CONFIG)
+        Helium::Deployer.new(File.dirname(config)).projects
       end
       
       # Returns the domain and path from which script files are served.
       def get_location
-        location = Helium::Deployer.new(File.dirname(CONFIG)).config['location'] ||
+        config = File.join(app_directory, CONFIG)
+        location = Helium::Deployer.new(File.dirname(config)).config['location'] ||
                    env['HTTP_HOST'] + '/' + Helium::WEB_ROOT
         
         location.gsub(/\/*$/, '')
@@ -27,18 +29,23 @@ def allow_write_access?(env)
         allowed_ips.include?(ip)
       end
       
+      def app_directory
+        File.expand_path(Helium::Web.config.app_dir)
+      end
+      
       # Returns +true+ if a lock exists stopping other deploy processes running.
       def locked?
-        File.file?(LOCK)
+        File.file?(File.join(app_directory, LOCK))
       end
       
       # Places a lock in the filesystem while running a code block. This is
       # used to make sure no more than one deploy process runs at once.
       def with_lock(&block)
-        File.open(LOCK, 'w') { |f| f.write(Time.now.to_s) }
-        at_exit { File.delete(LOCK) if File.exists?(LOCK) }
+        lockfile = File.join(app_directory, LOCK)
+        File.open(lockfile, 'w') { |f| f.write(Time.now.to_s) }
+        at_exit { File.delete(lockfile) if File.exists?(lockfile) }
         result = block.call
-        File.delete(LOCK) if File.exists?(LOCK)
+        File.delete(lockfile) if File.exists?(lockfile)
         result
       end
       
@@ -47,7 +54,7 @@ def view_file(name)
         @error    = 'You are not authorized to edit this file' unless allow_write_access?(env)
         @projects = project_config
         @action   = name.to_s
-        @file     = Helium::Web.const_get(name.to_s.upcase)
+        @file     = File.join(app_directory, Helium::Web.const_get(name.to_s.upcase))
         @contents = File.file?(@file) ? File.read(@file) : ''
         erb :edit
       end
diff --git a/templates/web/config.ru b/templates/web/config.ru
index ede1b9a..38e08d4 100644
--- a/templates/web/config.ru
+++ b/templates/web/config.ru
@@ -1,8 +1,7 @@
-::APP_DIR = ::File.expand_path(::File.dirname(__FILE__))
-
-require 'helium/web'
+require 'helium'
 
 Helium::Web.configure do |config|
+  config.app_dir File.dirname(__FILE__)
   config.allow_ips ['0.0.0.0', '127.0.0.1']
 end
 
diff --git a/test/deploy.yml b/test/deploy.yml
index 53428a8..32131fc 100644
--- a/test/deploy.yml
+++ b/test/deploy.yml
@@ -1,7 +1,7 @@
 ---
 js.class:
   repository:   git://github.com/jcoglan/js.class.git
-  version:      2.1.x
+  version:      3.0.1
 
 projects:
   bluff:        git://github.com/jcoglan/bluff.git