Running multiple versions of Internet Explorer on ubuntu

Good answer!
3./ I used this method and tried with ietester tool.

Actually I'm looking to run IE 6.0, 7.0 and 8.0 on a single system so that it eases for the developers for testing.

Any more ways?

Then you go to with the option 3 with 3 machines ('cause afaik Microsoft does not allow you to install three versions in one machine). XP with IE only does not consume much resources.

Or you can use this trick:
Install One windows 7 and use IE6, IE7, IE8 in XP Mode as this tut:
http://articles.sitepoint.com/article/ie6-ie7-ie8-win7-xp-mode

I've used Crossover for Linux for years.  They have a trial at:
http://www.codeweavers.com/products/cxlinux/

You should be able to install IE6, IE7.  But, I don't think they have positive results for IE8.

Crossover makes using Wine simple.  Just my opinion.

Yes, totally agree with bz43 too. If you can buy, you should go with CrossOver Pro,

Then the same way with you do with virtualbox, install IE6, IE7 into different "bottles". You can also install IE8 with CrossOver but the last time I tried, I didn't get correct tcp/ip information, so it didn't work. But the way I posted above can get you running IE8 (Of course still with bugs, but at least, it works)

But in my opinion, cause you want to test your application with your IEs, of course, native IE, so still vote for running it on native Windows Environment.

I can't afford to but bz43. Developers are already using vbox and checking with diff. ver. of IEs. So I'm wondering is there any more way to do so.

This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.