Is the remastered version of MM6 adapted to widescreen displays or at least playable in a window? Wouldn't like to purchase it and subsequently find out that it looks distorted or pixelated on my 24" LCD.

They are playable in the window
Next time please try to search instead of starting new topic.
And no, they are not adapted to widescreen (as far as I know).

I'd just like to add that the 640*480 (might be 800*600, but it's non-resizeable either way) window looks little larger than a box of matches on a 24-incher's native resolution.
No real widescreen support either, I'm afraid (works on a widescreen display, looks horrible). Your best bet would probably be to find a 3:4 monitor or use a virtual machine. :)

Hmm - I have it on my widescreen display and doesn't look TOO bad to me, usually hate the stretch - quite playable IMHO.

Usually, the graphics drivers allow you to stretch the image but maintain aspect ratio. So a circle will still be a circle (probably blockier), and not an oval. However, you have to contend with black bars at the top, bottom or sides.
This can be done via one of the options in the graphics driver software.

Yes, Shmutt has the solution. At least this works for NVIDIA and ATI graphics cards since it is an option in the driver settings. For Intel on board graphics cards and the like I don't know but hopefully they have a similar feature.
Also, on by nephew's windows seven old games ran non-stretched as default as opposed to Vista and XP where the default is stretched.
If you are going to play old games you should fix this as stretched games look horrible. If you have NVIDIA, just go the NVIDIA control panel, select screen and select scaling. There you can choose between running the games in their native resolution (too small on my monitor), resized, but with correct aspect ratio, (what I use), and resized to fit the entire screen ( which looks horrible.)
Of course the old games looked a little bit better on the old CRT monitors they were made for, but I think the newer LCD monitors scale the graphics better than the older ones did.
I remember how blurry HOMM 2 looked on my first LCD monitor. Now it looks almost like it did when the game was new.
In short: If you have XP or Vista you should look through your graphics card options. (If you can't change it through them, maybe someone have made a program for your needs?) If you have Windows Seven, you should be fine.