http://bugs.winehq.org/show_bug.cgi?id=12535
--- Comment #12 from Reece Dunn msclrhd@gmail.com 2008-12-26 10:38:00 --- The howto is a workaround - it avoids using Launch.exe to run and register the games.
This particular issue is fixed for Oberon Media, but there are other issues that affect Launch.exe working (bug 13459 and bug 16594).
I haven't re-tested Yahoo! games with recent git.