Internet Explorer & web development

Recently I have done some web development in my free time. I would like to share some of my findings:

• It is possible to install several versions of Internet Explorer simultaneously on a Windows box.
  This is pretty useful once IE has updated itself to version 7. Find out how to do it!
• Unfortunately this doesn’t work for Windows Vista, but virtualization can always be used.
  Microsoft provides several versions of Internet Explorer inside a Virtual PC Windows XP image. Although these images expire some time into the future, they can be very useful for testing purposes.
• It is also possible to install several versions of Internet Explorer – excluding version 7 – on Linux.
  Check it out!