How to Install IE6 IE7 IE8 : There are some tools that serves the purpose of previewing websites in different versions of Internet Explorer for web developers. An Internet Explorer Plug-ins, Add-on developer may need to install multiple Internet Explorers in different windows version for testing and debugging . In this case the issues of windows version (Windows XP, Vista , Windows 7) and its bit edition (32-bit, 64-bit) comes in to play. Running multiple versions of Internet Explorer at same the time does not works always smoothly. Its preferable to install these Internet Explorers in a virtual machine or create a windows system restore point. Here is a solution from tredosoft.com to install and run IE6 IE7 IE8 in same time ( Tested on Windows XP x86 ) :
1. Download and install Internet Explorer 6 and Older Version of IE from MultipleIE Setup .
2. Download Internet Explorer 7 standalone Installer to install IE7.
3. Download and install Internet Explorer 8
and your are ready to use IE6 IE7 and IE8 in same time, in same windows system.