http://bugs.winehq.org/show_bug.cgi?id=27288
--- Comment #3 from Hans Leidekker hans@meelstraat.net 2011-05-27 05:15:45 CDT --- Created an attachment (id=34912) --> (http://bugs.winehq.org/attachment.cgi?id=34912) msi: Pass custom action arguments separately to CreateProcess.
Try this patch.