No, you have to use a 3rd party piece of software. Eaiest way to do it is with MultipleIE's for Windows XP and IETester for Vista/7. Multiple IE's: http://tredosoft.com/Multiple_IE IETester: http://www.my-debugbar.com/wiki/IETester/HomePage
Sure you can! Just search Google for "thinstall internet explorer" and download the additional version you'd like to run alongside your already installed IE.
I think IE8 allows you to choose which version of IE you want to run on a site for compatibility, or maybe not just any version but I know there is a compatibility mode. Don't quote me on that though, I'm a Firefox user
Another easy solution to download IE 8, which has the mentioned feature of compatibility mode, which allows IE8 to be run as it would appear in IE 6 or IE 7, but with the speed and security of IE 8. Here is a link to downloading IE 8, and below that is a link explaining how to use compatibility mode. http://www.microsoft.com/nz/windows/internet-explorer/default.aspx http://support.microsoft.com/kb/956197/ Kyler IE 8 Outreach Team