Give IETester a whirl. IE 5.5, 6, 7, 8, and 9 preview render engines in a single executable.

http://www.my-debugbar.com/wiki/IETester/HomePage

I'm not convinced that IETester changes the underlying APIs correctly. Because of bad experience with "Multiple IE" simulators in the past I don't test on anything but the real install.

I hear you there. I just wish it were easier to have multiple versions of IE laying around without having to boot a VM for each. Heh.

ThinApp [http://en.wikipedia.org/wiki/VMware_ThinApp] is pretty useful when needing to do "classic" browser testing.

I don't think many people would be willing to invest $6,000 USD (minimum!) to test old versions of IE.

Yeah, I had trouble with those "portable IE6" implementations too. But IETester seems to be a lot closer to the real thing, at least as far as I can tell.

Hi,

IETester hooking is not perfect yet, but the engine is the correct versioned engine used on each tab. You can find more information here :

http://www.my-debugbar.com/wiki/IETester/HowDoesItWork

Regards.

IEs4Linux might work for you then. It can install the original IE6, IE5.5, and IE5 under Wine. IIRC it uses a separate wine tree for each version, so there's no chance of the IE6 js interpreter being run in IE5.

Is there a significant amount of people out there who still use IE5.5?