http://bugs.winehq.org/show_bug.cgi?id=23111
--- Comment #4 from Dan Kegel dank@kegel.com 2010-06-11 09:13:07 --- Hmm. When I try that, it bombs out very early during Sql Server 2008 install, saying I need windows installer 4.5. (And even the patch from http://www.winehq.org/pipermail/wine-patches/2010-June/089217.html doesn't seem to make it happy?)
I can reproduce this by just running the installer in the SqlExpress2008 subdirectory.