http://bugs.winehq.org/show_bug.cgi?id=34959
--- Comment #2 from WineBuG winebugs140@gmail.com 2013-11-20 12:43:02 CST --- (In reply to comment #1)
... To change it, you would have to patch and build a custom Wine. It wouldn't be runtime-configurable, at least not given how I plan to implement it.
Please consider some easier way than compilation. Maybe a special registry key to show the path to an icon?