I've seen several threads relating to XP-like taskbar grouping (kudos to Infopop, the search is much improved from my last visit to these fora), and have tried pretty much all the apps recommended ...

Start11 v1.2 beta is out, and it adds back the ability to ungroup apps in the taskbar, but also lets you decide to have the Start menu left aligned and apps centered in the taskbar and more! Stardock ...

This has been a little annoyance of mine for awhile:<BR><BR>I use a LOT of browser windows, usually as many as 10 copies of IE. Obviously, I've got all of these grouped together on the taskbar.