Microsoft provides free virtual images of their operating systems with IE 6, 7, 8 and 9 to test IE on Mac and Linux machines, http://bit.ly/XG76dm
Don't know if there are the same links but I'll still leave this here: http://www.reddit.com/r/buildapc/comments/xd44g
This spurred quite a discussion over at Hacker News, some very useful information, http://news.ycombinator.com/item?id=4786794
IE is probably the worst browser ever to plague the internet.