Maybe this Internet Explorer Collection
has been mentioned before in the forum, but a quick search didn't turn out anything, so I decided to post it. I guess it'll be very convenient for web developers and designers
I haven't tried it myself, so I can't comment on its features or about whether it "works as advertised"
Also, this is clearly NOT official and I'm not sure about Microsoft's stance on it
Internet Explorer Collection package install contain different versions of Internet Explorer. Just download the package, select the version of IE you want to install and its all good.
You can use any version of IE simultaneously (among the selected version during installation)