C:\Documents and Settings\user>irb
irb(main):001:0> $:
=> ["c:/ruby/lib/ruby/site_ruby/1.8", "c:/ruby/lib/ruby/site_ruby/1.8/
i386-msvcr
t", "c:/ruby/lib/ruby/site_ruby", "c:/ruby/lib/ruby/1.8", "c:/ruby/lib/
ruby/1.8/
i386-mswin32", "."]
irb(main):002:0> $: << 'c:/mylib'
=> ["c:/ruby/lib/ruby/site_ruby/1.8", "c:/ruby/lib/ruby/site_ruby/1.8/
i386-msvcr
t", "c:/ruby/lib/ruby/site_ruby", "c:/ruby/lib/ruby/1.8", "c:/ruby/lib/
ruby/1.8/
i386-mswin32", ".", "c:/mylib"]