since once you switch, that one then becomes 'current'?
Bichur, I'm surprised you don't get why this what I'm looking for can't solve my problem.
Do you have only 2 windows opened with FreeCell and MineSweeper?

In my work I use 15 instances of same application. When I switch from one represented for example as 3rd "pressed" button on taskbar to many different windows and then I want to return to the original window, I already know that I should search for it at the begining of taskbar because it was marked as 3rd window. I don't need browsing all 15 in two rows of buttons!
have you tried using the 'thumbnail representation' option?
Do you mean representation of minimized windows with screenshot? Unfortunately not, because all of 15 mentioned instances are remote terminal sessions which are to similar to recognize them on taskbar.
And of course you have to minimize all of windows which is not comfortable. What if you alt+tab'ing ?
Set OD to group taskbar items, then when click the grouped icon you will have a menu with all the titles for them
Sorry mate but I really don't like this option and I don't need OD to do grouping. It's supported by original XP's taskbar so OD doesn't add anything new here ...and most important ... grouping option doesn't occur in free OD (yeah I know - I'm a cheapskate)
The funny thing is that this what I'm looking for is a really basic thing which exist in almost every OS taskbar and I'm really surprised it doesn't exist in OD

Don't you think?