jesserundle

module KmlParser
  def self.parse(xml)
    doc = Nokogiri::XML(xml)
    output = {}
    output[:polylines] = []
    output[:markers] = []
    doc.xpath('//xmlns:Placemark').each do |kmlplacemark|
      if kmlplacemark.xpath('xmlns:LineString').empty?
        point = kmlplacemark.xpath('xmlns:Point/xmlns:coordinates').text.split(',').map{|x| x.to_f}
        icon = doc.css(kmlplacemark.xpath('xmlns:styleUrl').text).xpath('xmlns:IconStyle/xmlns:Icon/xmlns:href').text

jesserundle

Install Ruby using rubyinstaller:
http://rubyinstaller.org/downloads/
install to the C drive to a folder without spaces, eg c:/Ruby193

Install RubyGems:
http://rubyforge.org/frs/?group_id=126

on command line do:
'gem install rails'