http://bugs.winehq.org/show_bug.cgi?id=19502
--- Comment #7 from Dan Kegel dank@kegel.com 2010-01-20 11:03:37 --- FWIW: http://blogs.msdn.com/heaths/archive/2006/10/06/VS-2005-SP1-Takes-a-While-to... has some details about how horrendously slow this installer is even on windows, what-all it does, and shows how to do a silent install.