when is IE6 not IE6?

doctype and CSS in IE6

[theonliest]

2 questions (is that allowed?)
firstly is it possible to run 2 versions of Internet Explorer on a non NT version of windows (I've a feeling I know the answer!)
secondly, and following on from the above, I was previously under the impression that if you used an older DTD (say 4.0 transitional) or none at all on a html file and ran it on IE6(Win) it would behave in 'quirky' mode, ie, it would act like it would on IE5.5,
having experimented with this using css positioning (can you guess where this is going?), I've found this not to be the case, more specifically, the tantek 'box hack' doesn't work correctly (in IE6 with the wrong or no DTD), when it does work in IE5.5, therefore 'quirky' 6 isn't the same as 'regular' 5.5.
at the moment I have the privelage of 2 pcs (yes that's right, one has IE6, the other IE5.5) but this is a temporary measure and I would like to be in a position to test for both browsers on one computer in the future;
what to do?

[HarryM]

is it possible to run 2 versions of Internet Explorer on a non NT version of windows

Short answer is no.

My solution is a multi-boot system with several disk partitions. Win98 with IE4 runs on one partition, Win2000 with IE5 on another, and Win2000 with IE6 on another. Very easy to set up if you have a large enough disk.

[bill]

is it possible to run 2 versions of Internet Explorer on a non NT version of windows

Although I haven't tried them yet there are software packages that will create a virtual machine on your PC within which you could technically run different versions of IE. Check out this recent thread Browser/Platform Simulator [webmasterworld.com].