I've installed "RubyInstaller 1.9.2-p0" from http://rubyinstaller.org/. 
The output I get from the commands you asked me is:

ruvy -v:
ruby 1.9.2p0 (2010-08-18) [i386-mingw32]

ruby -e 'puts Encoding.find("locale")':
IBM737

ruby -e 'puts $:':
C:/Ruby192/lib/ruby/site_ruby/1.9.1
C:/Ruby192/lib/ruby/site_ruby/1.9.1/i386-msvcrt
C:/Ruby192/lib/ruby/site_ruby
C:/Ruby192/lib/ruby/vendor_ruby/1.9.1
C:/Ruby192/lib/ruby/vendor_ruby/1.9.1/i386-msvcrt
C:/Ruby192/lib/ruby/vendor_ruby
C:/Ruby192/lib/ruby/1.9.1
C:/Ruby192/lib/ruby/1.9.1/i386-mingw32

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